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82cb6acea4
* Unify some compile-time differences so that we have fewer uses of #ifdef CONFIG_OF in atmel_nand * Other general cleanups (removing unused functions, options, variables, fields; use correct interfaces) * Fix BUG() for new odd-sized NAND, which report non-power-of-2 dimensions via ONFI * Miscellaneous driver fixes (SPI NOR flash; BCM47xx NAND flash; etc.) * Improve differentiation between SLC and MLC NAND -- this clarifies an ABI issue regarding the MTD "type" (in sysfs and in ioctl(MEMGETINFO)), where the MTD_MLCNANDFLASH type was present but inconsistently used * Extend GPMI NAND to support multi-chip-select NAND for some platforms * Many improvements to the OMAP2/3 NAND driver, including an expanded DT binding to bring us closer to mainline support for some OMAP systems * Fix a deadlock in the error path of the Atmel NAND driver probe * Correct the error codes from MTD mmap() to conform to POSIX and the Linux Programmer's Manual. This is an acknowledged change in the MTD ABI, but I can't imagine somebody relying on the non-standard -ENOSYS error code specifically. Am I just being unimaginative? :) * Fix a few important GPMI NAND bugs (one regression from 3.12 and one long-standing race condition) * More? Read the log! -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) iQIcBAABAgAGBQJSgzYRAAoJEFySrpd9RFgtv8EP/3ZIS1w4fHyWafVSdgVFGR0Y urlVDhg7iBauh9admN9xxBz6CYRwhjby8GnN87Q1qzu95Xp63RVx31nNfdBW3DGd 92vSyskijYJcUtanBxYqGp1i3EbQcpF4mumqxnre3C4KTLNije41t/wNVqnXAstU DWho2iymZdkweKJ0DqBA7WF4l/YscdFyNDanO9JWiwII05Rh3Acv7FPMFm3Clblw Nvfwzgp4XycYMeIQtkmQgQ3GgeWtxPgQwqMofn97MVH4zeTsmUP317ohIMukLGJD db33J2xBdrIbk9P4D3RvjOCYyAyonu9y6/p+B1Vmj+R4CAUvQOIljhklHFoT3UZW OzUHPxB6T0+NZyQ/5IRQIYH9As++vdb/bzsUXm/cXceI4o4I0QCPy/8adifakBOF IUX9/BCdUOfKXvdOXY5dXMR2sY1IBg/1WfI+qcAoITsS/EVrUTrOcfSLyGqF0ERU c7mAzXiyp4D51x66/QnfJ4aJjlioQSoa3mK1j4fXqH08YB5Zclpz938Bo1AO3lWy /n+NYSbeXJoi4rVkNawjrRVs+0OTby2XQ5OqBlUMH6f30fqjUefPm66ZBMhbxzYu 5QFDctUbnHCyAPpOtM/WR3/NOkIqVhQl1331A+dG2TzLK0vTHs+kbt/YmIITpjI+ yn70XJGhk1F4gy8zhD+V =z5qO -----END PGP SIGNATURE----- Merge tag 'for-linus-20131112' of git://git.infradead.org/linux-mtd Pull MTD changes from Brian Norris: - Unify some compile-time differences so that we have fewer uses of #ifdef CONFIG_OF in atmel_nand - Other general cleanups (removing unused functions, options, variables, fields; use correct interfaces) - Fix BUG() for new odd-sized NAND, which report non-power-of-2 dimensions via ONFI - Miscellaneous driver fixes (SPI NOR flash; BCM47xx NAND flash; etc.) - Improve differentiation between SLC and MLC NAND -- this clarifies an ABI issue regarding the MTD "type" (in sysfs and in the MEMGETINFO ioctl), where the MTD_MLCNANDFLASH type was present but inconsistently used - Extend GPMI NAND to support multi-chip-select NAND for some platforms - Many improvements to the OMAP2/3 NAND driver, including an expanded DT binding to bring us closer to mainline support for some OMAP systems - Fix a deadlock in the error path of the Atmel NAND driver probe - Correct the error codes from MTD mmap() to conform to POSIX and the Linux Programmer's Manual. This is an acknowledged change in the MTD ABI, but I can't imagine somebody relying on the non-standard -ENOSYS error code specifically. Am I just being unimaginative? :) - Fix a few important GPMI NAND bugs (one regression from 3.12 and one long-standing race condition) - More? Read the log! * tag 'for-linus-20131112' of git://git.infradead.org/linux-mtd: (98 commits) mtd: gpmi: fix the NULL pointer mtd: gpmi: fix kernel BUG due to racing DMA operations mtd: mtdchar: return expected errors on mmap() call mtd: gpmi: only scan two chips for imx6 mtd: gpmi: Use devm_kzalloc() mtd: atmel_nand: fix bug driver will in a dead lock if no nand detected mtd: nand: use a local variable to simplify the nand_scan_tail mtd: nand: remove deprecated IRQF_DISABLED mtd: dataflash: Say if we find a device we don't support mtd: nand: omap: fix error return code in omap_nand_probe() mtd: nand_bbt: kill NAND_BBT_SCANALLPAGES mtd: m25p80: fixup device removal failure path mtd: mxc_nand: Include linux/of.h header mtd: remove duplicated include from mtdcore.c mtd: m25p80: add support for Macronix mx25l3255e mtd: nand: omap: remove selection of BCH ecc-scheme via KConfig mtd: nand: omap: updated devm_xx for all resource allocation and free calls mtd: nand: omap: use drivers/mtd/nand/nand_bch.c wrapper for BCH ECC instead of lib/bch.c mtd: nand: omap: clean-up ecc layout for BCH ecc schemes mtd: nand: omap2: clean-up BCHx_HW and BCHx_SW ECC configurations in device_probe ...
1882 lines
48 KiB
C
1882 lines
48 KiB
C
/*
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* GPMC support functions
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*
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* Copyright (C) 2005-2006 Nokia Corporation
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*
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* Author: Juha Yrjola
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*
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* Copyright (C) 2009 Texas Instruments
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* Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#undef DEBUG
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#include <linux/irq.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/clk.h>
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#include <linux/ioport.h>
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#include <linux/spinlock.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_mtd.h>
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#include <linux/of_device.h>
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#include <linux/mtd/nand.h>
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#include <linux/pm_runtime.h>
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#include <linux/platform_data/mtd-nand-omap2.h>
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#include <asm/mach-types.h>
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#include "soc.h"
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#include "common.h"
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#include "omap_device.h"
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#include "gpmc.h"
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#include "gpmc-nand.h"
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#include "gpmc-onenand.h"
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#define DEVICE_NAME "omap-gpmc"
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/* GPMC register offsets */
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#define GPMC_REVISION 0x00
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#define GPMC_SYSCONFIG 0x10
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#define GPMC_SYSSTATUS 0x14
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#define GPMC_IRQSTATUS 0x18
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#define GPMC_IRQENABLE 0x1c
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#define GPMC_TIMEOUT_CONTROL 0x40
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#define GPMC_ERR_ADDRESS 0x44
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#define GPMC_ERR_TYPE 0x48
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#define GPMC_CONFIG 0x50
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#define GPMC_STATUS 0x54
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#define GPMC_PREFETCH_CONFIG1 0x1e0
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#define GPMC_PREFETCH_CONFIG2 0x1e4
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#define GPMC_PREFETCH_CONTROL 0x1ec
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#define GPMC_PREFETCH_STATUS 0x1f0
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#define GPMC_ECC_CONFIG 0x1f4
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#define GPMC_ECC_CONTROL 0x1f8
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#define GPMC_ECC_SIZE_CONFIG 0x1fc
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#define GPMC_ECC1_RESULT 0x200
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#define GPMC_ECC_BCH_RESULT_0 0x240 /* not available on OMAP2 */
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#define GPMC_ECC_BCH_RESULT_1 0x244 /* not available on OMAP2 */
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#define GPMC_ECC_BCH_RESULT_2 0x248 /* not available on OMAP2 */
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#define GPMC_ECC_BCH_RESULT_3 0x24c /* not available on OMAP2 */
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/* GPMC ECC control settings */
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#define GPMC_ECC_CTRL_ECCCLEAR 0x100
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#define GPMC_ECC_CTRL_ECCDISABLE 0x000
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#define GPMC_ECC_CTRL_ECCREG1 0x001
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#define GPMC_ECC_CTRL_ECCREG2 0x002
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#define GPMC_ECC_CTRL_ECCREG3 0x003
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#define GPMC_ECC_CTRL_ECCREG4 0x004
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#define GPMC_ECC_CTRL_ECCREG5 0x005
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#define GPMC_ECC_CTRL_ECCREG6 0x006
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#define GPMC_ECC_CTRL_ECCREG7 0x007
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#define GPMC_ECC_CTRL_ECCREG8 0x008
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#define GPMC_ECC_CTRL_ECCREG9 0x009
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#define GPMC_CONFIG2_CSEXTRADELAY BIT(7)
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#define GPMC_CONFIG3_ADVEXTRADELAY BIT(7)
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#define GPMC_CONFIG4_OEEXTRADELAY BIT(7)
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#define GPMC_CONFIG4_WEEXTRADELAY BIT(23)
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#define GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN BIT(6)
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#define GPMC_CONFIG6_CYCLE2CYCLESAMECSEN BIT(7)
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#define GPMC_CS0_OFFSET 0x60
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#define GPMC_CS_SIZE 0x30
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#define GPMC_BCH_SIZE 0x10
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#define GPMC_MEM_END 0x3FFFFFFF
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#define GPMC_CHUNK_SHIFT 24 /* 16 MB */
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#define GPMC_SECTION_SHIFT 28 /* 128 MB */
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#define CS_NUM_SHIFT 24
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#define ENABLE_PREFETCH (0x1 << 7)
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#define DMA_MPU_MODE 2
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#define GPMC_REVISION_MAJOR(l) ((l >> 4) & 0xf)
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#define GPMC_REVISION_MINOR(l) (l & 0xf)
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#define GPMC_HAS_WR_ACCESS 0x1
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#define GPMC_HAS_WR_DATA_MUX_BUS 0x2
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#define GPMC_HAS_MUX_AAD 0x4
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#define GPMC_NR_WAITPINS 4
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/* XXX: Only NAND irq has been considered,currently these are the only ones used
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*/
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#define GPMC_NR_IRQ 2
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struct gpmc_client_irq {
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unsigned irq;
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u32 bitmask;
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};
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/* Structure to save gpmc cs context */
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struct gpmc_cs_config {
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u32 config1;
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u32 config2;
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u32 config3;
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u32 config4;
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u32 config5;
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u32 config6;
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u32 config7;
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int is_valid;
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};
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/*
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* Structure to save/restore gpmc context
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* to support core off on OMAP3
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*/
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struct omap3_gpmc_regs {
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u32 sysconfig;
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u32 irqenable;
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u32 timeout_ctrl;
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u32 config;
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u32 prefetch_config1;
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u32 prefetch_config2;
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u32 prefetch_control;
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struct gpmc_cs_config cs_context[GPMC_CS_NUM];
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};
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static struct gpmc_client_irq gpmc_client_irq[GPMC_NR_IRQ];
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static struct irq_chip gpmc_irq_chip;
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static int gpmc_irq_start;
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static struct resource gpmc_mem_root;
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static struct resource gpmc_cs_mem[GPMC_CS_NUM];
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static DEFINE_SPINLOCK(gpmc_mem_lock);
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/* Define chip-selects as reserved by default until probe completes */
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static unsigned int gpmc_cs_map = ((1 << GPMC_CS_NUM) - 1);
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static unsigned int gpmc_cs_num = GPMC_CS_NUM;
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static unsigned int gpmc_nr_waitpins;
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static struct device *gpmc_dev;
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static int gpmc_irq;
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static resource_size_t phys_base, mem_size;
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static unsigned gpmc_capability;
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static void __iomem *gpmc_base;
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static struct clk *gpmc_l3_clk;
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static irqreturn_t gpmc_handle_irq(int irq, void *dev);
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static void gpmc_write_reg(int idx, u32 val)
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{
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__raw_writel(val, gpmc_base + idx);
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}
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static u32 gpmc_read_reg(int idx)
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{
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return __raw_readl(gpmc_base + idx);
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}
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void gpmc_cs_write_reg(int cs, int idx, u32 val)
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{
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void __iomem *reg_addr;
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reg_addr = gpmc_base + GPMC_CS0_OFFSET + (cs * GPMC_CS_SIZE) + idx;
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__raw_writel(val, reg_addr);
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}
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static u32 gpmc_cs_read_reg(int cs, int idx)
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{
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void __iomem *reg_addr;
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reg_addr = gpmc_base + GPMC_CS0_OFFSET + (cs * GPMC_CS_SIZE) + idx;
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return __raw_readl(reg_addr);
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}
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/* TODO: Add support for gpmc_fck to clock framework and use it */
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static unsigned long gpmc_get_fclk_period(void)
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{
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unsigned long rate = clk_get_rate(gpmc_l3_clk);
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if (rate == 0) {
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printk(KERN_WARNING "gpmc_l3_clk not enabled\n");
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return 0;
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}
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rate /= 1000;
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rate = 1000000000 / rate; /* In picoseconds */
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return rate;
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}
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static unsigned int gpmc_ns_to_ticks(unsigned int time_ns)
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{
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unsigned long tick_ps;
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/* Calculate in picosecs to yield more exact results */
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tick_ps = gpmc_get_fclk_period();
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return (time_ns * 1000 + tick_ps - 1) / tick_ps;
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}
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static unsigned int gpmc_ps_to_ticks(unsigned int time_ps)
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{
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unsigned long tick_ps;
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/* Calculate in picosecs to yield more exact results */
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tick_ps = gpmc_get_fclk_period();
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return (time_ps + tick_ps - 1) / tick_ps;
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}
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unsigned int gpmc_ticks_to_ns(unsigned int ticks)
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{
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return ticks * gpmc_get_fclk_period() / 1000;
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}
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static unsigned int gpmc_ticks_to_ps(unsigned int ticks)
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{
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return ticks * gpmc_get_fclk_period();
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}
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static unsigned int gpmc_round_ps_to_ticks(unsigned int time_ps)
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{
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unsigned long ticks = gpmc_ps_to_ticks(time_ps);
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return ticks * gpmc_get_fclk_period();
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}
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static inline void gpmc_cs_modify_reg(int cs, int reg, u32 mask, bool value)
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{
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u32 l;
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l = gpmc_cs_read_reg(cs, reg);
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if (value)
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l |= mask;
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else
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l &= ~mask;
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gpmc_cs_write_reg(cs, reg, l);
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}
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static void gpmc_cs_bool_timings(int cs, const struct gpmc_bool_timings *p)
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{
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gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG1,
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GPMC_CONFIG1_TIME_PARA_GRAN,
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p->time_para_granularity);
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gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG2,
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GPMC_CONFIG2_CSEXTRADELAY, p->cs_extra_delay);
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gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG3,
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GPMC_CONFIG3_ADVEXTRADELAY, p->adv_extra_delay);
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gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4,
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GPMC_CONFIG4_OEEXTRADELAY, p->oe_extra_delay);
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gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4,
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GPMC_CONFIG4_OEEXTRADELAY, p->we_extra_delay);
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gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6,
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GPMC_CONFIG6_CYCLE2CYCLESAMECSEN,
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p->cycle2cyclesamecsen);
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gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6,
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GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN,
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p->cycle2cyclediffcsen);
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}
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#ifdef DEBUG
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static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit,
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int time, const char *name)
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#else
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static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit,
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int time)
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#endif
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{
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u32 l;
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int ticks, mask, nr_bits;
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if (time == 0)
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ticks = 0;
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else
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ticks = gpmc_ns_to_ticks(time);
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nr_bits = end_bit - st_bit + 1;
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if (ticks >= 1 << nr_bits) {
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#ifdef DEBUG
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printk(KERN_INFO "GPMC CS%d: %-10s* %3d ns, %3d ticks >= %d\n",
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cs, name, time, ticks, 1 << nr_bits);
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#endif
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return -1;
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}
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mask = (1 << nr_bits) - 1;
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l = gpmc_cs_read_reg(cs, reg);
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#ifdef DEBUG
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printk(KERN_INFO
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"GPMC CS%d: %-10s: %3d ticks, %3lu ns (was %3i ticks) %3d ns\n",
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cs, name, ticks, gpmc_get_fclk_period() * ticks / 1000,
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(l >> st_bit) & mask, time);
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#endif
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l &= ~(mask << st_bit);
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l |= ticks << st_bit;
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gpmc_cs_write_reg(cs, reg, l);
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return 0;
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}
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#ifdef DEBUG
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#define GPMC_SET_ONE(reg, st, end, field) \
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if (set_gpmc_timing_reg(cs, (reg), (st), (end), \
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t->field, #field) < 0) \
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return -1
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#else
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#define GPMC_SET_ONE(reg, st, end, field) \
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if (set_gpmc_timing_reg(cs, (reg), (st), (end), t->field) < 0) \
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return -1
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#endif
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int gpmc_calc_divider(unsigned int sync_clk)
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{
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int div;
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u32 l;
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l = sync_clk + (gpmc_get_fclk_period() - 1);
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div = l / gpmc_get_fclk_period();
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if (div > 4)
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return -1;
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if (div <= 0)
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div = 1;
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return div;
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}
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int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t)
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{
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int div;
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u32 l;
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div = gpmc_calc_divider(t->sync_clk);
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if (div < 0)
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return div;
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GPMC_SET_ONE(GPMC_CS_CONFIG2, 0, 3, cs_on);
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GPMC_SET_ONE(GPMC_CS_CONFIG2, 8, 12, cs_rd_off);
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GPMC_SET_ONE(GPMC_CS_CONFIG2, 16, 20, cs_wr_off);
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GPMC_SET_ONE(GPMC_CS_CONFIG3, 0, 3, adv_on);
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GPMC_SET_ONE(GPMC_CS_CONFIG3, 8, 12, adv_rd_off);
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GPMC_SET_ONE(GPMC_CS_CONFIG3, 16, 20, adv_wr_off);
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GPMC_SET_ONE(GPMC_CS_CONFIG4, 0, 3, oe_on);
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GPMC_SET_ONE(GPMC_CS_CONFIG4, 8, 12, oe_off);
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GPMC_SET_ONE(GPMC_CS_CONFIG4, 16, 19, we_on);
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GPMC_SET_ONE(GPMC_CS_CONFIG4, 24, 28, we_off);
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GPMC_SET_ONE(GPMC_CS_CONFIG5, 0, 4, rd_cycle);
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GPMC_SET_ONE(GPMC_CS_CONFIG5, 8, 12, wr_cycle);
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GPMC_SET_ONE(GPMC_CS_CONFIG5, 16, 20, access);
|
|
|
|
GPMC_SET_ONE(GPMC_CS_CONFIG5, 24, 27, page_burst_access);
|
|
|
|
GPMC_SET_ONE(GPMC_CS_CONFIG6, 0, 3, bus_turnaround);
|
|
GPMC_SET_ONE(GPMC_CS_CONFIG6, 8, 11, cycle2cycle_delay);
|
|
|
|
GPMC_SET_ONE(GPMC_CS_CONFIG1, 18, 19, wait_monitoring);
|
|
GPMC_SET_ONE(GPMC_CS_CONFIG1, 25, 26, clk_activation);
|
|
|
|
if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS)
|
|
GPMC_SET_ONE(GPMC_CS_CONFIG6, 16, 19, wr_data_mux_bus);
|
|
if (gpmc_capability & GPMC_HAS_WR_ACCESS)
|
|
GPMC_SET_ONE(GPMC_CS_CONFIG6, 24, 28, wr_access);
|
|
|
|
/* caller is expected to have initialized CONFIG1 to cover
|
|
* at least sync vs async
|
|
*/
|
|
l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
|
|
if (l & (GPMC_CONFIG1_READTYPE_SYNC | GPMC_CONFIG1_WRITETYPE_SYNC)) {
|
|
#ifdef DEBUG
|
|
printk(KERN_INFO "GPMC CS%d CLK period is %lu ns (div %d)\n",
|
|
cs, (div * gpmc_get_fclk_period()) / 1000, div);
|
|
#endif
|
|
l &= ~0x03;
|
|
l |= (div - 1);
|
|
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, l);
|
|
}
|
|
|
|
gpmc_cs_bool_timings(cs, &t->bool_timings);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpmc_cs_enable_mem(int cs, u32 base, u32 size)
|
|
{
|
|
u32 l;
|
|
u32 mask;
|
|
|
|
/*
|
|
* Ensure that base address is aligned on a
|
|
* boundary equal to or greater than size.
|
|
*/
|
|
if (base & (size - 1))
|
|
return -EINVAL;
|
|
|
|
mask = (1 << GPMC_SECTION_SHIFT) - size;
|
|
l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
|
|
l &= ~0x3f;
|
|
l = (base >> GPMC_CHUNK_SHIFT) & 0x3f;
|
|
l &= ~(0x0f << 8);
|
|
l |= ((mask >> GPMC_CHUNK_SHIFT) & 0x0f) << 8;
|
|
l |= GPMC_CONFIG7_CSVALID;
|
|
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void gpmc_cs_disable_mem(int cs)
|
|
{
|
|
u32 l;
|
|
|
|
l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
|
|
l &= ~GPMC_CONFIG7_CSVALID;
|
|
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l);
|
|
}
|
|
|
|
static void gpmc_cs_get_memconf(int cs, u32 *base, u32 *size)
|
|
{
|
|
u32 l;
|
|
u32 mask;
|
|
|
|
l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
|
|
*base = (l & 0x3f) << GPMC_CHUNK_SHIFT;
|
|
mask = (l >> 8) & 0x0f;
|
|
*size = (1 << GPMC_SECTION_SHIFT) - (mask << GPMC_CHUNK_SHIFT);
|
|
}
|
|
|
|
static int gpmc_cs_mem_enabled(int cs)
|
|
{
|
|
u32 l;
|
|
|
|
l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
|
|
return l & GPMC_CONFIG7_CSVALID;
|
|
}
|
|
|
|
static void gpmc_cs_set_reserved(int cs, int reserved)
|
|
{
|
|
gpmc_cs_map &= ~(1 << cs);
|
|
gpmc_cs_map |= (reserved ? 1 : 0) << cs;
|
|
}
|
|
|
|
static bool gpmc_cs_reserved(int cs)
|
|
{
|
|
return gpmc_cs_map & (1 << cs);
|
|
}
|
|
|
|
static unsigned long gpmc_mem_align(unsigned long size)
|
|
{
|
|
int order;
|
|
|
|
size = (size - 1) >> (GPMC_CHUNK_SHIFT - 1);
|
|
order = GPMC_CHUNK_SHIFT - 1;
|
|
do {
|
|
size >>= 1;
|
|
order++;
|
|
} while (size);
|
|
size = 1 << order;
|
|
return size;
|
|
}
|
|
|
|
static int gpmc_cs_insert_mem(int cs, unsigned long base, unsigned long size)
|
|
{
|
|
struct resource *res = &gpmc_cs_mem[cs];
|
|
int r;
|
|
|
|
size = gpmc_mem_align(size);
|
|
spin_lock(&gpmc_mem_lock);
|
|
res->start = base;
|
|
res->end = base + size - 1;
|
|
r = request_resource(&gpmc_mem_root, res);
|
|
spin_unlock(&gpmc_mem_lock);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int gpmc_cs_delete_mem(int cs)
|
|
{
|
|
struct resource *res = &gpmc_cs_mem[cs];
|
|
int r;
|
|
|
|
spin_lock(&gpmc_mem_lock);
|
|
r = release_resource(&gpmc_cs_mem[cs]);
|
|
res->start = 0;
|
|
res->end = 0;
|
|
spin_unlock(&gpmc_mem_lock);
|
|
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* gpmc_cs_remap - remaps a chip-select physical base address
|
|
* @cs: chip-select to remap
|
|
* @base: physical base address to re-map chip-select to
|
|
*
|
|
* Re-maps a chip-select to a new physical base address specified by
|
|
* "base". Returns 0 on success and appropriate negative error code
|
|
* on failure.
|
|
*/
|
|
static int gpmc_cs_remap(int cs, u32 base)
|
|
{
|
|
int ret;
|
|
u32 old_base, size;
|
|
|
|
if (cs > gpmc_cs_num) {
|
|
pr_err("%s: requested chip-select is disabled\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
gpmc_cs_get_memconf(cs, &old_base, &size);
|
|
if (base == old_base)
|
|
return 0;
|
|
gpmc_cs_disable_mem(cs);
|
|
ret = gpmc_cs_delete_mem(cs);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = gpmc_cs_insert_mem(cs, base, size);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = gpmc_cs_enable_mem(cs, base, size);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gpmc_cs_request(int cs, unsigned long size, unsigned long *base)
|
|
{
|
|
struct resource *res = &gpmc_cs_mem[cs];
|
|
int r = -1;
|
|
|
|
if (cs > gpmc_cs_num) {
|
|
pr_err("%s: requested chip-select is disabled\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
size = gpmc_mem_align(size);
|
|
if (size > (1 << GPMC_SECTION_SHIFT))
|
|
return -ENOMEM;
|
|
|
|
spin_lock(&gpmc_mem_lock);
|
|
if (gpmc_cs_reserved(cs)) {
|
|
r = -EBUSY;
|
|
goto out;
|
|
}
|
|
if (gpmc_cs_mem_enabled(cs))
|
|
r = adjust_resource(res, res->start & ~(size - 1), size);
|
|
if (r < 0)
|
|
r = allocate_resource(&gpmc_mem_root, res, size, 0, ~0,
|
|
size, NULL, NULL);
|
|
if (r < 0)
|
|
goto out;
|
|
|
|
r = gpmc_cs_enable_mem(cs, res->start, resource_size(res));
|
|
if (r < 0) {
|
|
release_resource(res);
|
|
goto out;
|
|
}
|
|
|
|
*base = res->start;
|
|
gpmc_cs_set_reserved(cs, 1);
|
|
out:
|
|
spin_unlock(&gpmc_mem_lock);
|
|
return r;
|
|
}
|
|
EXPORT_SYMBOL(gpmc_cs_request);
|
|
|
|
void gpmc_cs_free(int cs)
|
|
{
|
|
spin_lock(&gpmc_mem_lock);
|
|
if (cs >= gpmc_cs_num || cs < 0 || !gpmc_cs_reserved(cs)) {
|
|
printk(KERN_ERR "Trying to free non-reserved GPMC CS%d\n", cs);
|
|
BUG();
|
|
spin_unlock(&gpmc_mem_lock);
|
|
return;
|
|
}
|
|
gpmc_cs_disable_mem(cs);
|
|
release_resource(&gpmc_cs_mem[cs]);
|
|
gpmc_cs_set_reserved(cs, 0);
|
|
spin_unlock(&gpmc_mem_lock);
|
|
}
|
|
EXPORT_SYMBOL(gpmc_cs_free);
|
|
|
|
/**
|
|
* gpmc_configure - write request to configure gpmc
|
|
* @cmd: command type
|
|
* @wval: value to write
|
|
* @return status of the operation
|
|
*/
|
|
int gpmc_configure(int cmd, int wval)
|
|
{
|
|
u32 regval;
|
|
|
|
switch (cmd) {
|
|
case GPMC_ENABLE_IRQ:
|
|
gpmc_write_reg(GPMC_IRQENABLE, wval);
|
|
break;
|
|
|
|
case GPMC_SET_IRQ_STATUS:
|
|
gpmc_write_reg(GPMC_IRQSTATUS, wval);
|
|
break;
|
|
|
|
case GPMC_CONFIG_WP:
|
|
regval = gpmc_read_reg(GPMC_CONFIG);
|
|
if (wval)
|
|
regval &= ~GPMC_CONFIG_WRITEPROTECT; /* WP is ON */
|
|
else
|
|
regval |= GPMC_CONFIG_WRITEPROTECT; /* WP is OFF */
|
|
gpmc_write_reg(GPMC_CONFIG, regval);
|
|
break;
|
|
|
|
default:
|
|
pr_err("%s: command not supported\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(gpmc_configure);
|
|
|
|
void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs)
|
|
{
|
|
int i;
|
|
|
|
reg->gpmc_status = gpmc_base + GPMC_STATUS;
|
|
reg->gpmc_nand_command = gpmc_base + GPMC_CS0_OFFSET +
|
|
GPMC_CS_NAND_COMMAND + GPMC_CS_SIZE * cs;
|
|
reg->gpmc_nand_address = gpmc_base + GPMC_CS0_OFFSET +
|
|
GPMC_CS_NAND_ADDRESS + GPMC_CS_SIZE * cs;
|
|
reg->gpmc_nand_data = gpmc_base + GPMC_CS0_OFFSET +
|
|
GPMC_CS_NAND_DATA + GPMC_CS_SIZE * cs;
|
|
reg->gpmc_prefetch_config1 = gpmc_base + GPMC_PREFETCH_CONFIG1;
|
|
reg->gpmc_prefetch_config2 = gpmc_base + GPMC_PREFETCH_CONFIG2;
|
|
reg->gpmc_prefetch_control = gpmc_base + GPMC_PREFETCH_CONTROL;
|
|
reg->gpmc_prefetch_status = gpmc_base + GPMC_PREFETCH_STATUS;
|
|
reg->gpmc_ecc_config = gpmc_base + GPMC_ECC_CONFIG;
|
|
reg->gpmc_ecc_control = gpmc_base + GPMC_ECC_CONTROL;
|
|
reg->gpmc_ecc_size_config = gpmc_base + GPMC_ECC_SIZE_CONFIG;
|
|
reg->gpmc_ecc1_result = gpmc_base + GPMC_ECC1_RESULT;
|
|
|
|
for (i = 0; i < GPMC_BCH_NUM_REMAINDER; i++) {
|
|
reg->gpmc_bch_result0[i] = gpmc_base + GPMC_ECC_BCH_RESULT_0 +
|
|
GPMC_BCH_SIZE * i;
|
|
reg->gpmc_bch_result1[i] = gpmc_base + GPMC_ECC_BCH_RESULT_1 +
|
|
GPMC_BCH_SIZE * i;
|
|
reg->gpmc_bch_result2[i] = gpmc_base + GPMC_ECC_BCH_RESULT_2 +
|
|
GPMC_BCH_SIZE * i;
|
|
reg->gpmc_bch_result3[i] = gpmc_base + GPMC_ECC_BCH_RESULT_3 +
|
|
GPMC_BCH_SIZE * i;
|
|
}
|
|
}
|
|
|
|
int gpmc_get_client_irq(unsigned irq_config)
|
|
{
|
|
int i;
|
|
|
|
if (hweight32(irq_config) > 1)
|
|
return 0;
|
|
|
|
for (i = 0; i < GPMC_NR_IRQ; i++)
|
|
if (gpmc_client_irq[i].bitmask & irq_config)
|
|
return gpmc_client_irq[i].irq;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpmc_irq_endis(unsigned irq, bool endis)
|
|
{
|
|
int i;
|
|
u32 regval;
|
|
|
|
for (i = 0; i < GPMC_NR_IRQ; i++)
|
|
if (irq == gpmc_client_irq[i].irq) {
|
|
regval = gpmc_read_reg(GPMC_IRQENABLE);
|
|
if (endis)
|
|
regval |= gpmc_client_irq[i].bitmask;
|
|
else
|
|
regval &= ~gpmc_client_irq[i].bitmask;
|
|
gpmc_write_reg(GPMC_IRQENABLE, regval);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void gpmc_irq_disable(struct irq_data *p)
|
|
{
|
|
gpmc_irq_endis(p->irq, false);
|
|
}
|
|
|
|
static void gpmc_irq_enable(struct irq_data *p)
|
|
{
|
|
gpmc_irq_endis(p->irq, true);
|
|
}
|
|
|
|
static void gpmc_irq_noop(struct irq_data *data) { }
|
|
|
|
static unsigned int gpmc_irq_noop_ret(struct irq_data *data) { return 0; }
|
|
|
|
static int gpmc_setup_irq(void)
|
|
{
|
|
int i;
|
|
u32 regval;
|
|
|
|
if (!gpmc_irq)
|
|
return -EINVAL;
|
|
|
|
gpmc_irq_start = irq_alloc_descs(-1, 0, GPMC_NR_IRQ, 0);
|
|
if (gpmc_irq_start < 0) {
|
|
pr_err("irq_alloc_descs failed\n");
|
|
return gpmc_irq_start;
|
|
}
|
|
|
|
gpmc_irq_chip.name = "gpmc";
|
|
gpmc_irq_chip.irq_startup = gpmc_irq_noop_ret;
|
|
gpmc_irq_chip.irq_enable = gpmc_irq_enable;
|
|
gpmc_irq_chip.irq_disable = gpmc_irq_disable;
|
|
gpmc_irq_chip.irq_shutdown = gpmc_irq_noop;
|
|
gpmc_irq_chip.irq_ack = gpmc_irq_noop;
|
|
gpmc_irq_chip.irq_mask = gpmc_irq_noop;
|
|
gpmc_irq_chip.irq_unmask = gpmc_irq_noop;
|
|
|
|
gpmc_client_irq[0].bitmask = GPMC_IRQ_FIFOEVENTENABLE;
|
|
gpmc_client_irq[1].bitmask = GPMC_IRQ_COUNT_EVENT;
|
|
|
|
for (i = 0; i < GPMC_NR_IRQ; i++) {
|
|
gpmc_client_irq[i].irq = gpmc_irq_start + i;
|
|
irq_set_chip_and_handler(gpmc_client_irq[i].irq,
|
|
&gpmc_irq_chip, handle_simple_irq);
|
|
set_irq_flags(gpmc_client_irq[i].irq,
|
|
IRQF_VALID | IRQF_NOAUTOEN);
|
|
}
|
|
|
|
/* Disable interrupts */
|
|
gpmc_write_reg(GPMC_IRQENABLE, 0);
|
|
|
|
/* clear interrupts */
|
|
regval = gpmc_read_reg(GPMC_IRQSTATUS);
|
|
gpmc_write_reg(GPMC_IRQSTATUS, regval);
|
|
|
|
return request_irq(gpmc_irq, gpmc_handle_irq, 0, "gpmc", NULL);
|
|
}
|
|
|
|
static int gpmc_free_irq(void)
|
|
{
|
|
int i;
|
|
|
|
if (gpmc_irq)
|
|
free_irq(gpmc_irq, NULL);
|
|
|
|
for (i = 0; i < GPMC_NR_IRQ; i++) {
|
|
irq_set_handler(gpmc_client_irq[i].irq, NULL);
|
|
irq_set_chip(gpmc_client_irq[i].irq, &no_irq_chip);
|
|
irq_modify_status(gpmc_client_irq[i].irq, 0, 0);
|
|
}
|
|
|
|
irq_free_descs(gpmc_irq_start, GPMC_NR_IRQ);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void gpmc_mem_exit(void)
|
|
{
|
|
int cs;
|
|
|
|
for (cs = 0; cs < gpmc_cs_num; cs++) {
|
|
if (!gpmc_cs_mem_enabled(cs))
|
|
continue;
|
|
gpmc_cs_delete_mem(cs);
|
|
}
|
|
|
|
}
|
|
|
|
static void gpmc_mem_init(void)
|
|
{
|
|
int cs;
|
|
|
|
/*
|
|
* The first 1MB of GPMC address space is typically mapped to
|
|
* the internal ROM. Never allocate the first page, to
|
|
* facilitate bug detection; even if we didn't boot from ROM.
|
|
*/
|
|
gpmc_mem_root.start = SZ_1M;
|
|
gpmc_mem_root.end = GPMC_MEM_END;
|
|
|
|
/* Reserve all regions that has been set up by bootloader */
|
|
for (cs = 0; cs < gpmc_cs_num; cs++) {
|
|
u32 base, size;
|
|
|
|
if (!gpmc_cs_mem_enabled(cs))
|
|
continue;
|
|
gpmc_cs_get_memconf(cs, &base, &size);
|
|
if (gpmc_cs_insert_mem(cs, base, size)) {
|
|
pr_warn("%s: disabling cs %d mapped at 0x%x-0x%x\n",
|
|
__func__, cs, base, base + size);
|
|
gpmc_cs_disable_mem(cs);
|
|
}
|
|
}
|
|
}
|
|
|
|
static u32 gpmc_round_ps_to_sync_clk(u32 time_ps, u32 sync_clk)
|
|
{
|
|
u32 temp;
|
|
int div;
|
|
|
|
div = gpmc_calc_divider(sync_clk);
|
|
temp = gpmc_ps_to_ticks(time_ps);
|
|
temp = (temp + div - 1) / div;
|
|
return gpmc_ticks_to_ps(temp * div);
|
|
}
|
|
|
|
/* XXX: can the cycles be avoided ? */
|
|
static int gpmc_calc_sync_read_timings(struct gpmc_timings *gpmc_t,
|
|
struct gpmc_device_timings *dev_t,
|
|
bool mux)
|
|
{
|
|
u32 temp;
|
|
|
|
/* adv_rd_off */
|
|
temp = dev_t->t_avdp_r;
|
|
/* XXX: mux check required ? */
|
|
if (mux) {
|
|
/* XXX: t_avdp not to be required for sync, only added for tusb
|
|
* this indirectly necessitates requirement of t_avdp_r and
|
|
* t_avdp_w instead of having a single t_avdp
|
|
*/
|
|
temp = max_t(u32, temp, gpmc_t->clk_activation + dev_t->t_avdh);
|
|
temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp);
|
|
}
|
|
gpmc_t->adv_rd_off = gpmc_round_ps_to_ticks(temp);
|
|
|
|
/* oe_on */
|
|
temp = dev_t->t_oeasu; /* XXX: remove this ? */
|
|
if (mux) {
|
|
temp = max_t(u32, temp, gpmc_t->clk_activation + dev_t->t_ach);
|
|
temp = max_t(u32, temp, gpmc_t->adv_rd_off +
|
|
gpmc_ticks_to_ps(dev_t->cyc_aavdh_oe));
|
|
}
|
|
gpmc_t->oe_on = gpmc_round_ps_to_ticks(temp);
|
|
|
|
/* access */
|
|
/* XXX: any scope for improvement ?, by combining oe_on
|
|
* and clk_activation, need to check whether
|
|
* access = clk_activation + round to sync clk ?
|
|
*/
|
|
temp = max_t(u32, dev_t->t_iaa, dev_t->cyc_iaa * gpmc_t->sync_clk);
|
|
temp += gpmc_t->clk_activation;
|
|
if (dev_t->cyc_oe)
|
|
temp = max_t(u32, temp, gpmc_t->oe_on +
|
|
gpmc_ticks_to_ps(dev_t->cyc_oe));
|
|
gpmc_t->access = gpmc_round_ps_to_ticks(temp);
|
|
|
|
gpmc_t->oe_off = gpmc_t->access + gpmc_ticks_to_ps(1);
|
|
gpmc_t->cs_rd_off = gpmc_t->oe_off;
|
|
|
|
/* rd_cycle */
|
|
temp = max_t(u32, dev_t->t_cez_r, dev_t->t_oez);
|
|
temp = gpmc_round_ps_to_sync_clk(temp, gpmc_t->sync_clk) +
|
|
gpmc_t->access;
|
|
/* XXX: barter t_ce_rdyz with t_cez_r ? */
|
|
if (dev_t->t_ce_rdyz)
|
|
temp = max_t(u32, temp, gpmc_t->cs_rd_off + dev_t->t_ce_rdyz);
|
|
gpmc_t->rd_cycle = gpmc_round_ps_to_ticks(temp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpmc_calc_sync_write_timings(struct gpmc_timings *gpmc_t,
|
|
struct gpmc_device_timings *dev_t,
|
|
bool mux)
|
|
{
|
|
u32 temp;
|
|
|
|
/* adv_wr_off */
|
|
temp = dev_t->t_avdp_w;
|
|
if (mux) {
|
|
temp = max_t(u32, temp,
|
|
gpmc_t->clk_activation + dev_t->t_avdh);
|
|
temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp);
|
|
}
|
|
gpmc_t->adv_wr_off = gpmc_round_ps_to_ticks(temp);
|
|
|
|
/* wr_data_mux_bus */
|
|
temp = max_t(u32, dev_t->t_weasu,
|
|
gpmc_t->clk_activation + dev_t->t_rdyo);
|
|
/* XXX: shouldn't mux be kept as a whole for wr_data_mux_bus ?,
|
|
* and in that case remember to handle we_on properly
|
|
*/
|
|
if (mux) {
|
|
temp = max_t(u32, temp,
|
|
gpmc_t->adv_wr_off + dev_t->t_aavdh);
|
|
temp = max_t(u32, temp, gpmc_t->adv_wr_off +
|
|
gpmc_ticks_to_ps(dev_t->cyc_aavdh_we));
|
|
}
|
|
gpmc_t->wr_data_mux_bus = gpmc_round_ps_to_ticks(temp);
|
|
|
|
/* we_on */
|
|
if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS)
|
|
gpmc_t->we_on = gpmc_round_ps_to_ticks(dev_t->t_weasu);
|
|
else
|
|
gpmc_t->we_on = gpmc_t->wr_data_mux_bus;
|
|
|
|
/* wr_access */
|
|
/* XXX: gpmc_capability check reqd ? , even if not, will not harm */
|
|
gpmc_t->wr_access = gpmc_t->access;
|
|
|
|
/* we_off */
|
|
temp = gpmc_t->we_on + dev_t->t_wpl;
|
|
temp = max_t(u32, temp,
|
|
gpmc_t->wr_access + gpmc_ticks_to_ps(1));
|
|
temp = max_t(u32, temp,
|
|
gpmc_t->we_on + gpmc_ticks_to_ps(dev_t->cyc_wpl));
|
|
gpmc_t->we_off = gpmc_round_ps_to_ticks(temp);
|
|
|
|
gpmc_t->cs_wr_off = gpmc_round_ps_to_ticks(gpmc_t->we_off +
|
|
dev_t->t_wph);
|
|
|
|
/* wr_cycle */
|
|
temp = gpmc_round_ps_to_sync_clk(dev_t->t_cez_w, gpmc_t->sync_clk);
|
|
temp += gpmc_t->wr_access;
|
|
/* XXX: barter t_ce_rdyz with t_cez_w ? */
|
|
if (dev_t->t_ce_rdyz)
|
|
temp = max_t(u32, temp,
|
|
gpmc_t->cs_wr_off + dev_t->t_ce_rdyz);
|
|
gpmc_t->wr_cycle = gpmc_round_ps_to_ticks(temp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpmc_calc_async_read_timings(struct gpmc_timings *gpmc_t,
|
|
struct gpmc_device_timings *dev_t,
|
|
bool mux)
|
|
{
|
|
u32 temp;
|
|
|
|
/* adv_rd_off */
|
|
temp = dev_t->t_avdp_r;
|
|
if (mux)
|
|
temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp);
|
|
gpmc_t->adv_rd_off = gpmc_round_ps_to_ticks(temp);
|
|
|
|
/* oe_on */
|
|
temp = dev_t->t_oeasu;
|
|
if (mux)
|
|
temp = max_t(u32, temp,
|
|
gpmc_t->adv_rd_off + dev_t->t_aavdh);
|
|
gpmc_t->oe_on = gpmc_round_ps_to_ticks(temp);
|
|
|
|
/* access */
|
|
temp = max_t(u32, dev_t->t_iaa, /* XXX: remove t_iaa in async ? */
|
|
gpmc_t->oe_on + dev_t->t_oe);
|
|
temp = max_t(u32, temp,
|
|
gpmc_t->cs_on + dev_t->t_ce);
|
|
temp = max_t(u32, temp,
|
|
gpmc_t->adv_on + dev_t->t_aa);
|
|
gpmc_t->access = gpmc_round_ps_to_ticks(temp);
|
|
|
|
gpmc_t->oe_off = gpmc_t->access + gpmc_ticks_to_ps(1);
|
|
gpmc_t->cs_rd_off = gpmc_t->oe_off;
|
|
|
|
/* rd_cycle */
|
|
temp = max_t(u32, dev_t->t_rd_cycle,
|
|
gpmc_t->cs_rd_off + dev_t->t_cez_r);
|
|
temp = max_t(u32, temp, gpmc_t->oe_off + dev_t->t_oez);
|
|
gpmc_t->rd_cycle = gpmc_round_ps_to_ticks(temp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpmc_calc_async_write_timings(struct gpmc_timings *gpmc_t,
|
|
struct gpmc_device_timings *dev_t,
|
|
bool mux)
|
|
{
|
|
u32 temp;
|
|
|
|
/* adv_wr_off */
|
|
temp = dev_t->t_avdp_w;
|
|
if (mux)
|
|
temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp);
|
|
gpmc_t->adv_wr_off = gpmc_round_ps_to_ticks(temp);
|
|
|
|
/* wr_data_mux_bus */
|
|
temp = dev_t->t_weasu;
|
|
if (mux) {
|
|
temp = max_t(u32, temp, gpmc_t->adv_wr_off + dev_t->t_aavdh);
|
|
temp = max_t(u32, temp, gpmc_t->adv_wr_off +
|
|
gpmc_ticks_to_ps(dev_t->cyc_aavdh_we));
|
|
}
|
|
gpmc_t->wr_data_mux_bus = gpmc_round_ps_to_ticks(temp);
|
|
|
|
/* we_on */
|
|
if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS)
|
|
gpmc_t->we_on = gpmc_round_ps_to_ticks(dev_t->t_weasu);
|
|
else
|
|
gpmc_t->we_on = gpmc_t->wr_data_mux_bus;
|
|
|
|
/* we_off */
|
|
temp = gpmc_t->we_on + dev_t->t_wpl;
|
|
gpmc_t->we_off = gpmc_round_ps_to_ticks(temp);
|
|
|
|
gpmc_t->cs_wr_off = gpmc_round_ps_to_ticks(gpmc_t->we_off +
|
|
dev_t->t_wph);
|
|
|
|
/* wr_cycle */
|
|
temp = max_t(u32, dev_t->t_wr_cycle,
|
|
gpmc_t->cs_wr_off + dev_t->t_cez_w);
|
|
gpmc_t->wr_cycle = gpmc_round_ps_to_ticks(temp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpmc_calc_sync_common_timings(struct gpmc_timings *gpmc_t,
|
|
struct gpmc_device_timings *dev_t)
|
|
{
|
|
u32 temp;
|
|
|
|
gpmc_t->sync_clk = gpmc_calc_divider(dev_t->clk) *
|
|
gpmc_get_fclk_period();
|
|
|
|
gpmc_t->page_burst_access = gpmc_round_ps_to_sync_clk(
|
|
dev_t->t_bacc,
|
|
gpmc_t->sync_clk);
|
|
|
|
temp = max_t(u32, dev_t->t_ces, dev_t->t_avds);
|
|
gpmc_t->clk_activation = gpmc_round_ps_to_ticks(temp);
|
|
|
|
if (gpmc_calc_divider(gpmc_t->sync_clk) != 1)
|
|
return 0;
|
|
|
|
if (dev_t->ce_xdelay)
|
|
gpmc_t->bool_timings.cs_extra_delay = true;
|
|
if (dev_t->avd_xdelay)
|
|
gpmc_t->bool_timings.adv_extra_delay = true;
|
|
if (dev_t->oe_xdelay)
|
|
gpmc_t->bool_timings.oe_extra_delay = true;
|
|
if (dev_t->we_xdelay)
|
|
gpmc_t->bool_timings.we_extra_delay = true;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpmc_calc_common_timings(struct gpmc_timings *gpmc_t,
|
|
struct gpmc_device_timings *dev_t,
|
|
bool sync)
|
|
{
|
|
u32 temp;
|
|
|
|
/* cs_on */
|
|
gpmc_t->cs_on = gpmc_round_ps_to_ticks(dev_t->t_ceasu);
|
|
|
|
/* adv_on */
|
|
temp = dev_t->t_avdasu;
|
|
if (dev_t->t_ce_avd)
|
|
temp = max_t(u32, temp,
|
|
gpmc_t->cs_on + dev_t->t_ce_avd);
|
|
gpmc_t->adv_on = gpmc_round_ps_to_ticks(temp);
|
|
|
|
if (sync)
|
|
gpmc_calc_sync_common_timings(gpmc_t, dev_t);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* TODO: remove this function once all peripherals are confirmed to
|
|
* work with generic timing. Simultaneously gpmc_cs_set_timings()
|
|
* has to be modified to handle timings in ps instead of ns
|
|
*/
|
|
static void gpmc_convert_ps_to_ns(struct gpmc_timings *t)
|
|
{
|
|
t->cs_on /= 1000;
|
|
t->cs_rd_off /= 1000;
|
|
t->cs_wr_off /= 1000;
|
|
t->adv_on /= 1000;
|
|
t->adv_rd_off /= 1000;
|
|
t->adv_wr_off /= 1000;
|
|
t->we_on /= 1000;
|
|
t->we_off /= 1000;
|
|
t->oe_on /= 1000;
|
|
t->oe_off /= 1000;
|
|
t->page_burst_access /= 1000;
|
|
t->access /= 1000;
|
|
t->rd_cycle /= 1000;
|
|
t->wr_cycle /= 1000;
|
|
t->bus_turnaround /= 1000;
|
|
t->cycle2cycle_delay /= 1000;
|
|
t->wait_monitoring /= 1000;
|
|
t->clk_activation /= 1000;
|
|
t->wr_access /= 1000;
|
|
t->wr_data_mux_bus /= 1000;
|
|
}
|
|
|
|
int gpmc_calc_timings(struct gpmc_timings *gpmc_t,
|
|
struct gpmc_settings *gpmc_s,
|
|
struct gpmc_device_timings *dev_t)
|
|
{
|
|
bool mux = false, sync = false;
|
|
|
|
if (gpmc_s) {
|
|
mux = gpmc_s->mux_add_data ? true : false;
|
|
sync = (gpmc_s->sync_read || gpmc_s->sync_write);
|
|
}
|
|
|
|
memset(gpmc_t, 0, sizeof(*gpmc_t));
|
|
|
|
gpmc_calc_common_timings(gpmc_t, dev_t, sync);
|
|
|
|
if (gpmc_s && gpmc_s->sync_read)
|
|
gpmc_calc_sync_read_timings(gpmc_t, dev_t, mux);
|
|
else
|
|
gpmc_calc_async_read_timings(gpmc_t, dev_t, mux);
|
|
|
|
if (gpmc_s && gpmc_s->sync_write)
|
|
gpmc_calc_sync_write_timings(gpmc_t, dev_t, mux);
|
|
else
|
|
gpmc_calc_async_write_timings(gpmc_t, dev_t, mux);
|
|
|
|
/* TODO: remove, see function definition */
|
|
gpmc_convert_ps_to_ns(gpmc_t);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gpmc_cs_program_settings - programs non-timing related settings
|
|
* @cs: GPMC chip-select to program
|
|
* @p: pointer to GPMC settings structure
|
|
*
|
|
* Programs non-timing related settings for a GPMC chip-select, such as
|
|
* bus-width, burst configuration, etc. Function should be called once
|
|
* for each chip-select that is being used and must be called before
|
|
* calling gpmc_cs_set_timings() as timing parameters in the CONFIG1
|
|
* register will be initialised to zero by this function. Returns 0 on
|
|
* success and appropriate negative error code on failure.
|
|
*/
|
|
int gpmc_cs_program_settings(int cs, struct gpmc_settings *p)
|
|
{
|
|
u32 config1;
|
|
|
|
if ((!p->device_width) || (p->device_width > GPMC_DEVWIDTH_16BIT)) {
|
|
pr_err("%s: invalid width %d!", __func__, p->device_width);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Address-data multiplexing not supported for NAND devices */
|
|
if (p->device_nand && p->mux_add_data) {
|
|
pr_err("%s: invalid configuration!\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if ((p->mux_add_data > GPMC_MUX_AD) ||
|
|
((p->mux_add_data == GPMC_MUX_AAD) &&
|
|
!(gpmc_capability & GPMC_HAS_MUX_AAD))) {
|
|
pr_err("%s: invalid multiplex configuration!\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Page/burst mode supports lengths of 4, 8 and 16 bytes */
|
|
if (p->burst_read || p->burst_write) {
|
|
switch (p->burst_len) {
|
|
case GPMC_BURST_4:
|
|
case GPMC_BURST_8:
|
|
case GPMC_BURST_16:
|
|
break;
|
|
default:
|
|
pr_err("%s: invalid page/burst-length (%d)\n",
|
|
__func__, p->burst_len);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if ((p->wait_on_read || p->wait_on_write) &&
|
|
(p->wait_pin > gpmc_nr_waitpins)) {
|
|
pr_err("%s: invalid wait-pin (%d)\n", __func__, p->wait_pin);
|
|
return -EINVAL;
|
|
}
|
|
|
|
config1 = GPMC_CONFIG1_DEVICESIZE((p->device_width - 1));
|
|
|
|
if (p->sync_read)
|
|
config1 |= GPMC_CONFIG1_READTYPE_SYNC;
|
|
if (p->sync_write)
|
|
config1 |= GPMC_CONFIG1_WRITETYPE_SYNC;
|
|
if (p->wait_on_read)
|
|
config1 |= GPMC_CONFIG1_WAIT_READ_MON;
|
|
if (p->wait_on_write)
|
|
config1 |= GPMC_CONFIG1_WAIT_WRITE_MON;
|
|
if (p->wait_on_read || p->wait_on_write)
|
|
config1 |= GPMC_CONFIG1_WAIT_PIN_SEL(p->wait_pin);
|
|
if (p->device_nand)
|
|
config1 |= GPMC_CONFIG1_DEVICETYPE(GPMC_DEVICETYPE_NAND);
|
|
if (p->mux_add_data)
|
|
config1 |= GPMC_CONFIG1_MUXTYPE(p->mux_add_data);
|
|
if (p->burst_read)
|
|
config1 |= GPMC_CONFIG1_READMULTIPLE_SUPP;
|
|
if (p->burst_write)
|
|
config1 |= GPMC_CONFIG1_WRITEMULTIPLE_SUPP;
|
|
if (p->burst_read || p->burst_write) {
|
|
config1 |= GPMC_CONFIG1_PAGE_LEN(p->burst_len >> 3);
|
|
config1 |= p->burst_wrap ? GPMC_CONFIG1_WRAPBURST_SUPP : 0;
|
|
}
|
|
|
|
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, config1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static struct of_device_id gpmc_dt_ids[] = {
|
|
{ .compatible = "ti,omap2420-gpmc" },
|
|
{ .compatible = "ti,omap2430-gpmc" },
|
|
{ .compatible = "ti,omap3430-gpmc" }, /* omap3430 & omap3630 */
|
|
{ .compatible = "ti,omap4430-gpmc" }, /* omap4430 & omap4460 & omap543x */
|
|
{ .compatible = "ti,am3352-gpmc" }, /* am335x devices */
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, gpmc_dt_ids);
|
|
|
|
/**
|
|
* gpmc_read_settings_dt - read gpmc settings from device-tree
|
|
* @np: pointer to device-tree node for a gpmc child device
|
|
* @p: pointer to gpmc settings structure
|
|
*
|
|
* Reads the GPMC settings for a GPMC child device from device-tree and
|
|
* stores them in the GPMC settings structure passed. The GPMC settings
|
|
* structure is initialised to zero by this function and so any
|
|
* previously stored settings will be cleared.
|
|
*/
|
|
void gpmc_read_settings_dt(struct device_node *np, struct gpmc_settings *p)
|
|
{
|
|
memset(p, 0, sizeof(struct gpmc_settings));
|
|
|
|
p->sync_read = of_property_read_bool(np, "gpmc,sync-read");
|
|
p->sync_write = of_property_read_bool(np, "gpmc,sync-write");
|
|
of_property_read_u32(np, "gpmc,device-width", &p->device_width);
|
|
of_property_read_u32(np, "gpmc,mux-add-data", &p->mux_add_data);
|
|
|
|
if (!of_property_read_u32(np, "gpmc,burst-length", &p->burst_len)) {
|
|
p->burst_wrap = of_property_read_bool(np, "gpmc,burst-wrap");
|
|
p->burst_read = of_property_read_bool(np, "gpmc,burst-read");
|
|
p->burst_write = of_property_read_bool(np, "gpmc,burst-write");
|
|
if (!p->burst_read && !p->burst_write)
|
|
pr_warn("%s: page/burst-length set but not used!\n",
|
|
__func__);
|
|
}
|
|
|
|
if (!of_property_read_u32(np, "gpmc,wait-pin", &p->wait_pin)) {
|
|
p->wait_on_read = of_property_read_bool(np,
|
|
"gpmc,wait-on-read");
|
|
p->wait_on_write = of_property_read_bool(np,
|
|
"gpmc,wait-on-write");
|
|
if (!p->wait_on_read && !p->wait_on_write)
|
|
pr_warn("%s: read/write wait monitoring not enabled!\n",
|
|
__func__);
|
|
}
|
|
}
|
|
|
|
static void __maybe_unused gpmc_read_timings_dt(struct device_node *np,
|
|
struct gpmc_timings *gpmc_t)
|
|
{
|
|
struct gpmc_bool_timings *p;
|
|
|
|
if (!np || !gpmc_t)
|
|
return;
|
|
|
|
memset(gpmc_t, 0, sizeof(*gpmc_t));
|
|
|
|
/* minimum clock period for syncronous mode */
|
|
of_property_read_u32(np, "gpmc,sync-clk-ps", &gpmc_t->sync_clk);
|
|
|
|
/* chip select timtings */
|
|
of_property_read_u32(np, "gpmc,cs-on-ns", &gpmc_t->cs_on);
|
|
of_property_read_u32(np, "gpmc,cs-rd-off-ns", &gpmc_t->cs_rd_off);
|
|
of_property_read_u32(np, "gpmc,cs-wr-off-ns", &gpmc_t->cs_wr_off);
|
|
|
|
/* ADV signal timings */
|
|
of_property_read_u32(np, "gpmc,adv-on-ns", &gpmc_t->adv_on);
|
|
of_property_read_u32(np, "gpmc,adv-rd-off-ns", &gpmc_t->adv_rd_off);
|
|
of_property_read_u32(np, "gpmc,adv-wr-off-ns", &gpmc_t->adv_wr_off);
|
|
|
|
/* WE signal timings */
|
|
of_property_read_u32(np, "gpmc,we-on-ns", &gpmc_t->we_on);
|
|
of_property_read_u32(np, "gpmc,we-off-ns", &gpmc_t->we_off);
|
|
|
|
/* OE signal timings */
|
|
of_property_read_u32(np, "gpmc,oe-on-ns", &gpmc_t->oe_on);
|
|
of_property_read_u32(np, "gpmc,oe-off-ns", &gpmc_t->oe_off);
|
|
|
|
/* access and cycle timings */
|
|
of_property_read_u32(np, "gpmc,page-burst-access-ns",
|
|
&gpmc_t->page_burst_access);
|
|
of_property_read_u32(np, "gpmc,access-ns", &gpmc_t->access);
|
|
of_property_read_u32(np, "gpmc,rd-cycle-ns", &gpmc_t->rd_cycle);
|
|
of_property_read_u32(np, "gpmc,wr-cycle-ns", &gpmc_t->wr_cycle);
|
|
of_property_read_u32(np, "gpmc,bus-turnaround-ns",
|
|
&gpmc_t->bus_turnaround);
|
|
of_property_read_u32(np, "gpmc,cycle2cycle-delay-ns",
|
|
&gpmc_t->cycle2cycle_delay);
|
|
of_property_read_u32(np, "gpmc,wait-monitoring-ns",
|
|
&gpmc_t->wait_monitoring);
|
|
of_property_read_u32(np, "gpmc,clk-activation-ns",
|
|
&gpmc_t->clk_activation);
|
|
|
|
/* only applicable to OMAP3+ */
|
|
of_property_read_u32(np, "gpmc,wr-access-ns", &gpmc_t->wr_access);
|
|
of_property_read_u32(np, "gpmc,wr-data-mux-bus-ns",
|
|
&gpmc_t->wr_data_mux_bus);
|
|
|
|
/* bool timing parameters */
|
|
p = &gpmc_t->bool_timings;
|
|
|
|
p->cycle2cyclediffcsen =
|
|
of_property_read_bool(np, "gpmc,cycle2cycle-diffcsen");
|
|
p->cycle2cyclesamecsen =
|
|
of_property_read_bool(np, "gpmc,cycle2cycle-samecsen");
|
|
p->we_extra_delay = of_property_read_bool(np, "gpmc,we-extra-delay");
|
|
p->oe_extra_delay = of_property_read_bool(np, "gpmc,oe-extra-delay");
|
|
p->adv_extra_delay = of_property_read_bool(np, "gpmc,adv-extra-delay");
|
|
p->cs_extra_delay = of_property_read_bool(np, "gpmc,cs-extra-delay");
|
|
p->time_para_granularity =
|
|
of_property_read_bool(np, "gpmc,time-para-granularity");
|
|
}
|
|
|
|
#ifdef CONFIG_MTD_NAND
|
|
|
|
static const char * const nand_xfer_types[] = {
|
|
[NAND_OMAP_PREFETCH_POLLED] = "prefetch-polled",
|
|
[NAND_OMAP_POLLED] = "polled",
|
|
[NAND_OMAP_PREFETCH_DMA] = "prefetch-dma",
|
|
[NAND_OMAP_PREFETCH_IRQ] = "prefetch-irq",
|
|
};
|
|
|
|
static int gpmc_probe_nand_child(struct platform_device *pdev,
|
|
struct device_node *child)
|
|
{
|
|
u32 val;
|
|
const char *s;
|
|
struct gpmc_timings gpmc_t;
|
|
struct omap_nand_platform_data *gpmc_nand_data;
|
|
|
|
if (of_property_read_u32(child, "reg", &val) < 0) {
|
|
dev_err(&pdev->dev, "%s has no 'reg' property\n",
|
|
child->full_name);
|
|
return -ENODEV;
|
|
}
|
|
|
|
gpmc_nand_data = devm_kzalloc(&pdev->dev, sizeof(*gpmc_nand_data),
|
|
GFP_KERNEL);
|
|
if (!gpmc_nand_data)
|
|
return -ENOMEM;
|
|
|
|
gpmc_nand_data->cs = val;
|
|
gpmc_nand_data->of_node = child;
|
|
|
|
/* Detect availability of ELM module */
|
|
gpmc_nand_data->elm_of_node = of_parse_phandle(child, "ti,elm-id", 0);
|
|
if (gpmc_nand_data->elm_of_node == NULL)
|
|
gpmc_nand_data->elm_of_node =
|
|
of_parse_phandle(child, "elm_id", 0);
|
|
if (gpmc_nand_data->elm_of_node == NULL)
|
|
pr_warn("%s: ti,elm-id property not found\n", __func__);
|
|
|
|
/* select ecc-scheme for NAND */
|
|
if (of_property_read_string(child, "ti,nand-ecc-opt", &s)) {
|
|
pr_err("%s: ti,nand-ecc-opt not found\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
if (!strcmp(s, "ham1") || !strcmp(s, "sw") ||
|
|
!strcmp(s, "hw") || !strcmp(s, "hw-romcode"))
|
|
gpmc_nand_data->ecc_opt =
|
|
OMAP_ECC_HAM1_CODE_HW;
|
|
else if (!strcmp(s, "bch4"))
|
|
if (gpmc_nand_data->elm_of_node)
|
|
gpmc_nand_data->ecc_opt =
|
|
OMAP_ECC_BCH4_CODE_HW;
|
|
else
|
|
gpmc_nand_data->ecc_opt =
|
|
OMAP_ECC_BCH4_CODE_HW_DETECTION_SW;
|
|
else if (!strcmp(s, "bch8"))
|
|
if (gpmc_nand_data->elm_of_node)
|
|
gpmc_nand_data->ecc_opt =
|
|
OMAP_ECC_BCH8_CODE_HW;
|
|
else
|
|
gpmc_nand_data->ecc_opt =
|
|
OMAP_ECC_BCH8_CODE_HW_DETECTION_SW;
|
|
else
|
|
pr_err("%s: ti,nand-ecc-opt invalid value\n", __func__);
|
|
|
|
/* select data transfer mode for NAND controller */
|
|
if (!of_property_read_string(child, "ti,nand-xfer-type", &s))
|
|
for (val = 0; val < ARRAY_SIZE(nand_xfer_types); val++)
|
|
if (!strcasecmp(s, nand_xfer_types[val])) {
|
|
gpmc_nand_data->xfer_type = val;
|
|
break;
|
|
}
|
|
|
|
val = of_get_nand_bus_width(child);
|
|
if (val == 16)
|
|
gpmc_nand_data->devsize = NAND_BUSWIDTH_16;
|
|
|
|
gpmc_read_timings_dt(child, &gpmc_t);
|
|
gpmc_nand_init(gpmc_nand_data, &gpmc_t);
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
static int gpmc_probe_nand_child(struct platform_device *pdev,
|
|
struct device_node *child)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_MTD_ONENAND
|
|
static int gpmc_probe_onenand_child(struct platform_device *pdev,
|
|
struct device_node *child)
|
|
{
|
|
u32 val;
|
|
struct omap_onenand_platform_data *gpmc_onenand_data;
|
|
|
|
if (of_property_read_u32(child, "reg", &val) < 0) {
|
|
dev_err(&pdev->dev, "%s has no 'reg' property\n",
|
|
child->full_name);
|
|
return -ENODEV;
|
|
}
|
|
|
|
gpmc_onenand_data = devm_kzalloc(&pdev->dev, sizeof(*gpmc_onenand_data),
|
|
GFP_KERNEL);
|
|
if (!gpmc_onenand_data)
|
|
return -ENOMEM;
|
|
|
|
gpmc_onenand_data->cs = val;
|
|
gpmc_onenand_data->of_node = child;
|
|
gpmc_onenand_data->dma_channel = -1;
|
|
|
|
if (!of_property_read_u32(child, "dma-channel", &val))
|
|
gpmc_onenand_data->dma_channel = val;
|
|
|
|
gpmc_onenand_init(gpmc_onenand_data);
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
static int gpmc_probe_onenand_child(struct platform_device *pdev,
|
|
struct device_node *child)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* gpmc_probe_generic_child - configures the gpmc for a child device
|
|
* @pdev: pointer to gpmc platform device
|
|
* @child: pointer to device-tree node for child device
|
|
*
|
|
* Allocates and configures a GPMC chip-select for a child device.
|
|
* Returns 0 on success and appropriate negative error code on failure.
|
|
*/
|
|
static int gpmc_probe_generic_child(struct platform_device *pdev,
|
|
struct device_node *child)
|
|
{
|
|
struct gpmc_settings gpmc_s;
|
|
struct gpmc_timings gpmc_t;
|
|
struct resource res;
|
|
unsigned long base;
|
|
int ret, cs;
|
|
|
|
if (of_property_read_u32(child, "reg", &cs) < 0) {
|
|
dev_err(&pdev->dev, "%s has no 'reg' property\n",
|
|
child->full_name);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (of_address_to_resource(child, 0, &res) < 0) {
|
|
dev_err(&pdev->dev, "%s has malformed 'reg' property\n",
|
|
child->full_name);
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = gpmc_cs_request(cs, resource_size(&res), &base);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "cannot request GPMC CS %d\n", cs);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* FIXME: gpmc_cs_request() will map the CS to an arbitary
|
|
* location in the gpmc address space. When booting with
|
|
* device-tree we want the NOR flash to be mapped to the
|
|
* location specified in the device-tree blob. So remap the
|
|
* CS to this location. Once DT migration is complete should
|
|
* just make gpmc_cs_request() map a specific address.
|
|
*/
|
|
ret = gpmc_cs_remap(cs, res.start);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "cannot remap GPMC CS %d to %pa\n",
|
|
cs, &res.start);
|
|
goto err;
|
|
}
|
|
|
|
gpmc_read_settings_dt(child, &gpmc_s);
|
|
|
|
ret = of_property_read_u32(child, "bank-width", &gpmc_s.device_width);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
ret = gpmc_cs_program_settings(cs, &gpmc_s);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
gpmc_read_timings_dt(child, &gpmc_t);
|
|
gpmc_cs_set_timings(cs, &gpmc_t);
|
|
|
|
if (of_platform_device_create(child, NULL, &pdev->dev))
|
|
return 0;
|
|
|
|
dev_err(&pdev->dev, "failed to create gpmc child %s\n", child->name);
|
|
ret = -ENODEV;
|
|
|
|
err:
|
|
gpmc_cs_free(cs);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* REVISIT: Add timing support from slls644g.pdf
|
|
*/
|
|
static int gpmc_probe_8250(struct platform_device *pdev,
|
|
struct device_node *child)
|
|
{
|
|
struct resource res;
|
|
unsigned long base;
|
|
int ret, cs;
|
|
|
|
if (of_property_read_u32(child, "reg", &cs) < 0) {
|
|
dev_err(&pdev->dev, "%s has no 'reg' property\n",
|
|
child->full_name);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (of_address_to_resource(child, 0, &res) < 0) {
|
|
dev_err(&pdev->dev, "%s has malformed 'reg' property\n",
|
|
child->full_name);
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = gpmc_cs_request(cs, resource_size(&res), &base);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "cannot request GPMC CS %d\n", cs);
|
|
return ret;
|
|
}
|
|
|
|
if (of_platform_device_create(child, NULL, &pdev->dev))
|
|
return 0;
|
|
|
|
dev_err(&pdev->dev, "failed to create gpmc child %s\n", child->name);
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int gpmc_probe_dt(struct platform_device *pdev)
|
|
{
|
|
int ret;
|
|
struct device_node *child;
|
|
const struct of_device_id *of_id =
|
|
of_match_device(gpmc_dt_ids, &pdev->dev);
|
|
|
|
if (!of_id)
|
|
return 0;
|
|
|
|
ret = of_property_read_u32(pdev->dev.of_node, "gpmc,num-cs",
|
|
&gpmc_cs_num);
|
|
if (ret < 0) {
|
|
pr_err("%s: number of chip-selects not defined\n", __func__);
|
|
return ret;
|
|
} else if (gpmc_cs_num < 1) {
|
|
pr_err("%s: all chip-selects are disabled\n", __func__);
|
|
return -EINVAL;
|
|
} else if (gpmc_cs_num > GPMC_CS_NUM) {
|
|
pr_err("%s: number of supported chip-selects cannot be > %d\n",
|
|
__func__, GPMC_CS_NUM);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = of_property_read_u32(pdev->dev.of_node, "gpmc,num-waitpins",
|
|
&gpmc_nr_waitpins);
|
|
if (ret < 0) {
|
|
pr_err("%s: number of wait pins not found!\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
for_each_child_of_node(pdev->dev.of_node, child) {
|
|
|
|
if (!child->name)
|
|
continue;
|
|
|
|
if (of_node_cmp(child->name, "nand") == 0)
|
|
ret = gpmc_probe_nand_child(pdev, child);
|
|
else if (of_node_cmp(child->name, "onenand") == 0)
|
|
ret = gpmc_probe_onenand_child(pdev, child);
|
|
else if (of_node_cmp(child->name, "ethernet") == 0 ||
|
|
of_node_cmp(child->name, "nor") == 0)
|
|
ret = gpmc_probe_generic_child(pdev, child);
|
|
else if (of_node_cmp(child->name, "8250") == 0)
|
|
ret = gpmc_probe_8250(pdev, child);
|
|
|
|
if (WARN(ret < 0, "%s: probing gpmc child %s failed\n",
|
|
__func__, child->full_name))
|
|
of_node_put(child);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
static int gpmc_probe_dt(struct platform_device *pdev)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int gpmc_probe(struct platform_device *pdev)
|
|
{
|
|
int rc;
|
|
u32 l;
|
|
struct resource *res;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (res == NULL)
|
|
return -ENOENT;
|
|
|
|
phys_base = res->start;
|
|
mem_size = resource_size(res);
|
|
|
|
gpmc_base = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(gpmc_base))
|
|
return PTR_ERR(gpmc_base);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
|
if (res == NULL)
|
|
dev_warn(&pdev->dev, "Failed to get resource: irq\n");
|
|
else
|
|
gpmc_irq = res->start;
|
|
|
|
gpmc_l3_clk = clk_get(&pdev->dev, "fck");
|
|
if (IS_ERR(gpmc_l3_clk)) {
|
|
dev_err(&pdev->dev, "error: clk_get\n");
|
|
gpmc_irq = 0;
|
|
return PTR_ERR(gpmc_l3_clk);
|
|
}
|
|
|
|
pm_runtime_enable(&pdev->dev);
|
|
pm_runtime_get_sync(&pdev->dev);
|
|
|
|
gpmc_dev = &pdev->dev;
|
|
|
|
l = gpmc_read_reg(GPMC_REVISION);
|
|
|
|
/*
|
|
* FIXME: Once device-tree migration is complete the below flags
|
|
* should be populated based upon the device-tree compatible
|
|
* string. For now just use the IP revision. OMAP3+ devices have
|
|
* the wr_access and wr_data_mux_bus register fields. OMAP4+
|
|
* devices support the addr-addr-data multiplex protocol.
|
|
*
|
|
* GPMC IP revisions:
|
|
* - OMAP24xx = 2.0
|
|
* - OMAP3xxx = 5.0
|
|
* - OMAP44xx/54xx/AM335x = 6.0
|
|
*/
|
|
if (GPMC_REVISION_MAJOR(l) > 0x4)
|
|
gpmc_capability = GPMC_HAS_WR_ACCESS | GPMC_HAS_WR_DATA_MUX_BUS;
|
|
if (GPMC_REVISION_MAJOR(l) > 0x5)
|
|
gpmc_capability |= GPMC_HAS_MUX_AAD;
|
|
dev_info(gpmc_dev, "GPMC revision %d.%d\n", GPMC_REVISION_MAJOR(l),
|
|
GPMC_REVISION_MINOR(l));
|
|
|
|
gpmc_mem_init();
|
|
|
|
if (gpmc_setup_irq() < 0)
|
|
dev_warn(gpmc_dev, "gpmc_setup_irq failed\n");
|
|
|
|
/* Now the GPMC is initialised, unreserve the chip-selects */
|
|
gpmc_cs_map = 0;
|
|
|
|
if (!pdev->dev.of_node) {
|
|
gpmc_cs_num = GPMC_CS_NUM;
|
|
gpmc_nr_waitpins = GPMC_NR_WAITPINS;
|
|
}
|
|
|
|
rc = gpmc_probe_dt(pdev);
|
|
if (rc < 0) {
|
|
pm_runtime_put_sync(&pdev->dev);
|
|
clk_put(gpmc_l3_clk);
|
|
dev_err(gpmc_dev, "failed to probe DT parameters\n");
|
|
return rc;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gpmc_remove(struct platform_device *pdev)
|
|
{
|
|
gpmc_free_irq();
|
|
gpmc_mem_exit();
|
|
pm_runtime_put_sync(&pdev->dev);
|
|
pm_runtime_disable(&pdev->dev);
|
|
gpmc_dev = NULL;
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int gpmc_suspend(struct device *dev)
|
|
{
|
|
omap3_gpmc_save_context();
|
|
pm_runtime_put_sync(dev);
|
|
return 0;
|
|
}
|
|
|
|
static int gpmc_resume(struct device *dev)
|
|
{
|
|
pm_runtime_get_sync(dev);
|
|
omap3_gpmc_restore_context();
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(gpmc_pm_ops, gpmc_suspend, gpmc_resume);
|
|
|
|
static struct platform_driver gpmc_driver = {
|
|
.probe = gpmc_probe,
|
|
.remove = gpmc_remove,
|
|
.driver = {
|
|
.name = DEVICE_NAME,
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = of_match_ptr(gpmc_dt_ids),
|
|
.pm = &gpmc_pm_ops,
|
|
},
|
|
};
|
|
|
|
static __init int gpmc_init(void)
|
|
{
|
|
return platform_driver_register(&gpmc_driver);
|
|
}
|
|
|
|
static __exit void gpmc_exit(void)
|
|
{
|
|
platform_driver_unregister(&gpmc_driver);
|
|
|
|
}
|
|
|
|
omap_postcore_initcall(gpmc_init);
|
|
module_exit(gpmc_exit);
|
|
|
|
static int __init omap_gpmc_init(void)
|
|
{
|
|
struct omap_hwmod *oh;
|
|
struct platform_device *pdev;
|
|
char *oh_name = "gpmc";
|
|
|
|
/*
|
|
* if the board boots up with a populated DT, do not
|
|
* manually add the device from this initcall
|
|
*/
|
|
if (of_have_populated_dt())
|
|
return -ENODEV;
|
|
|
|
oh = omap_hwmod_lookup(oh_name);
|
|
if (!oh) {
|
|
pr_err("Could not look up %s\n", oh_name);
|
|
return -ENODEV;
|
|
}
|
|
|
|
pdev = omap_device_build(DEVICE_NAME, -1, oh, NULL, 0);
|
|
WARN(IS_ERR(pdev), "could not build omap_device for %s\n", oh_name);
|
|
|
|
return PTR_RET(pdev);
|
|
}
|
|
omap_postcore_initcall(omap_gpmc_init);
|
|
|
|
static irqreturn_t gpmc_handle_irq(int irq, void *dev)
|
|
{
|
|
int i;
|
|
u32 regval;
|
|
|
|
regval = gpmc_read_reg(GPMC_IRQSTATUS);
|
|
|
|
if (!regval)
|
|
return IRQ_NONE;
|
|
|
|
for (i = 0; i < GPMC_NR_IRQ; i++)
|
|
if (regval & gpmc_client_irq[i].bitmask)
|
|
generic_handle_irq(gpmc_client_irq[i].irq);
|
|
|
|
gpmc_write_reg(GPMC_IRQSTATUS, regval);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static struct omap3_gpmc_regs gpmc_context;
|
|
|
|
void omap3_gpmc_save_context(void)
|
|
{
|
|
int i;
|
|
|
|
gpmc_context.sysconfig = gpmc_read_reg(GPMC_SYSCONFIG);
|
|
gpmc_context.irqenable = gpmc_read_reg(GPMC_IRQENABLE);
|
|
gpmc_context.timeout_ctrl = gpmc_read_reg(GPMC_TIMEOUT_CONTROL);
|
|
gpmc_context.config = gpmc_read_reg(GPMC_CONFIG);
|
|
gpmc_context.prefetch_config1 = gpmc_read_reg(GPMC_PREFETCH_CONFIG1);
|
|
gpmc_context.prefetch_config2 = gpmc_read_reg(GPMC_PREFETCH_CONFIG2);
|
|
gpmc_context.prefetch_control = gpmc_read_reg(GPMC_PREFETCH_CONTROL);
|
|
for (i = 0; i < gpmc_cs_num; i++) {
|
|
gpmc_context.cs_context[i].is_valid = gpmc_cs_mem_enabled(i);
|
|
if (gpmc_context.cs_context[i].is_valid) {
|
|
gpmc_context.cs_context[i].config1 =
|
|
gpmc_cs_read_reg(i, GPMC_CS_CONFIG1);
|
|
gpmc_context.cs_context[i].config2 =
|
|
gpmc_cs_read_reg(i, GPMC_CS_CONFIG2);
|
|
gpmc_context.cs_context[i].config3 =
|
|
gpmc_cs_read_reg(i, GPMC_CS_CONFIG3);
|
|
gpmc_context.cs_context[i].config4 =
|
|
gpmc_cs_read_reg(i, GPMC_CS_CONFIG4);
|
|
gpmc_context.cs_context[i].config5 =
|
|
gpmc_cs_read_reg(i, GPMC_CS_CONFIG5);
|
|
gpmc_context.cs_context[i].config6 =
|
|
gpmc_cs_read_reg(i, GPMC_CS_CONFIG6);
|
|
gpmc_context.cs_context[i].config7 =
|
|
gpmc_cs_read_reg(i, GPMC_CS_CONFIG7);
|
|
}
|
|
}
|
|
}
|
|
|
|
void omap3_gpmc_restore_context(void)
|
|
{
|
|
int i;
|
|
|
|
gpmc_write_reg(GPMC_SYSCONFIG, gpmc_context.sysconfig);
|
|
gpmc_write_reg(GPMC_IRQENABLE, gpmc_context.irqenable);
|
|
gpmc_write_reg(GPMC_TIMEOUT_CONTROL, gpmc_context.timeout_ctrl);
|
|
gpmc_write_reg(GPMC_CONFIG, gpmc_context.config);
|
|
gpmc_write_reg(GPMC_PREFETCH_CONFIG1, gpmc_context.prefetch_config1);
|
|
gpmc_write_reg(GPMC_PREFETCH_CONFIG2, gpmc_context.prefetch_config2);
|
|
gpmc_write_reg(GPMC_PREFETCH_CONTROL, gpmc_context.prefetch_control);
|
|
for (i = 0; i < gpmc_cs_num; i++) {
|
|
if (gpmc_context.cs_context[i].is_valid) {
|
|
gpmc_cs_write_reg(i, GPMC_CS_CONFIG1,
|
|
gpmc_context.cs_context[i].config1);
|
|
gpmc_cs_write_reg(i, GPMC_CS_CONFIG2,
|
|
gpmc_context.cs_context[i].config2);
|
|
gpmc_cs_write_reg(i, GPMC_CS_CONFIG3,
|
|
gpmc_context.cs_context[i].config3);
|
|
gpmc_cs_write_reg(i, GPMC_CS_CONFIG4,
|
|
gpmc_context.cs_context[i].config4);
|
|
gpmc_cs_write_reg(i, GPMC_CS_CONFIG5,
|
|
gpmc_context.cs_context[i].config5);
|
|
gpmc_cs_write_reg(i, GPMC_CS_CONFIG6,
|
|
gpmc_context.cs_context[i].config6);
|
|
gpmc_cs_write_reg(i, GPMC_CS_CONFIG7,
|
|
gpmc_context.cs_context[i].config7);
|
|
}
|
|
}
|
|
}
|