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spi/topcliff_pch: support new device ML7213 IOH

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Support ML7213 device of OKI SEMICONDUCTOR.
ML7213 is companion chip of Intel Atom E6xx series for IVI(In-Vehicle Infotainment).
ML7213 is compatible for Intel EG20T PCH.

v4: - Delete unrelated whitespace
    - Prevent device driver from accessing platform data
    - Add __devinit and __devexit
    - Save pdev->dev to pd_dev->dev.parent
    - Have own suspend/resume processing in platform_driver.
    - Care returned value in pch_spi_init
    - Change unregister order

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Tomoya MORINAGA 2011-06-07 14:50:10 +09:00 committed by Grant Likely
parent ca632f5566
commit f016aeb655
2 changed files with 324 additions and 292 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/spi/Kconfig
View File

@ -371,12 +371,15 @@ config SPI_TI_SSP
serial port.
config SPI_TOPCLIFF_PCH
tristate "Topcliff PCH SPI Controller"
tristate "Intel EG20T PCH/OKI SEMICONDUCTOR ML7213 IOH SPI controller"
depends on PCI
help
SPI driver for the Topcliff PCH (Platform Controller Hub) SPI bus
used in some x86 embedded processors.
This driver also supports the ML7213, a companion chip for the
Atom E6xx series and compatible with the Intel EG20T PCH.
config SPI_TXX9
tristate "Toshiba TXx9 SPI controller"
depends on GENERIC_GPIO && CPU_TX49XX

611
drivers/spi/spi-topcliff-pch.c
View File

@ -26,6 +26,7 @@
#include <linux/spi/spidev.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
/* Register offsets */
#define PCH_SPCR 0x00 /* SPI control register */
@ -35,6 +36,7 @@
#define PCH_SPDRR 0x10 /* SPI read data register */
#define PCH_SSNXCR 0x18 /* SSN Expand Control Register */
#define PCH_SRST 0x1C /* SPI reset register */
#define PCH_SPI_ADDRESS_SIZE 0x20
#define PCH_SPSR_TFD 0x000007C0
#define PCH_SPSR_RFD 0x0000F800
@ -75,7 +77,8 @@
#define SPSR_FI_BIT (1 << 2)
#define SPBRR_SIZE_BIT (1 << 10)
#define PCH_ALL (SPCR_TFIE_BIT|SPCR_RFIE_BIT|SPCR_FIE_BIT|SPCR_ORIE_BIT|SPCR_MDFIE_BIT)
#define PCH_ALL (SPCR_TFIE_BIT|SPCR_RFIE_BIT|SPCR_FIE_BIT|\
SPCR_ORIE_BIT|SPCR_MDFIE_BIT)
#define SPCR_RFIC_FIELD 20
#define SPCR_TFIC_FIELD 16
@ -88,6 +91,16 @@
#define PCH_CLOCK_HZ 50000000
#define PCH_MAX_SPBR 1023
/* Definition for ML7213 by OKI SEMICONDUCTOR */
#define PCI_VENDOR_ID_ROHM 0x10DB
#define PCI_DEVICE_ID_ML7213_SPI 0x802c
/*
* Set the number of SPI instance max
* Intel EG20T PCH : 1ch
* OKI SEMICONDUCTOR ML7213 IOH : 2ch
*/
#define PCH_SPI_MAX_DEV 2
/**
* struct pch_spi_data - Holds the SPI channel specific details
@ -121,6 +134,9 @@
* @cur_trans: The current transfer that this SPI driver is
* handling
* @board_dat: Reference to the SPI device data structure
* @plat_dev: platform_device structure
* @ch: SPI channel number
* @irq_reg_sts: Status of IRQ registration
*/
struct pch_spi_data {
void __iomem *io_remap_addr;
@ -144,27 +160,33 @@ struct pch_spi_data {
struct spi_message *current_msg;
struct spi_transfer *cur_trans;
struct pch_spi_board_data *board_dat;
struct platform_device *plat_dev;
int ch;
u8 irq_reg_sts;
};
/**
* struct pch_spi_board_data - Holds the SPI device specific details
* @pdev: Pointer to the PCI device
* @irq_reg_sts: Status of IRQ registration
* @pci_req_sts: Status of pci_request_regions
* @suspend_sts: Status of suspend
* @data: Pointer to SPI channel data structure
* @num: The number of SPI device instance
*/
struct pch_spi_board_data {
struct pci_dev *pdev;
u8 irq_reg_sts;
u8 pci_req_sts;
u8 suspend_sts;
struct pch_spi_data *data;
int num;
};
struct pch_pd_dev_save {
int num;
struct platform_device *pd_save[PCH_SPI_MAX_DEV];
struct pch_spi_board_data *board_dat;
};
static struct pci_device_id pch_spi_pcidev_id[] = {
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_GE_SPI)},
{0,}
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_GE_SPI), 1, },
{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7213_SPI), 2, },
{ }
};
/**
@ -283,11 +305,11 @@ static void pch_spi_handler_sub(struct pch_spi_data *data, u32 reg_spsr_val,
static irqreturn_t pch_spi_handler(int irq, void *dev_id)
{
u32 reg_spsr_val;
struct pch_spi_data *data;
void __iomem *spsr;
void __iomem *io_remap_addr;
irqreturn_t ret = IRQ_NONE;
struct pch_spi_board_data *board_dat = dev_id;
struct pch_spi_data *data = dev_id;
struct pch_spi_board_data *board_dat = data->board_dat;
if (board_dat->suspend_sts) {
dev_dbg(&board_dat->pdev->dev,
@ -295,7 +317,6 @@ static irqreturn_t pch_spi_handler(int irq, void *dev_id)
return IRQ_NONE;
}
data = board_dat->data;
io_remap_addr = data->io_remap_addr;
spsr = io_remap_addr + PCH_SPSR;
@ -868,117 +889,49 @@ static void pch_spi_process_messages(struct work_struct *pwork)
} while (data->cur_trans != NULL);
}
static void pch_spi_free_resources(struct pch_spi_board_data *board_dat)
static void pch_spi_free_resources(struct pch_spi_board_data *board_dat,
struct pch_spi_data *data)
{
dev_dbg(&board_dat->pdev->dev, "%s ENTRY\n", __func__);
/* free workqueue */
if (board_dat->data->wk != NULL) {
destroy_workqueue(board_dat->data->wk);
board_dat->data->wk = NULL;
if (data->wk != NULL) {
destroy_workqueue(data->wk);
data->wk = NULL;
dev_dbg(&board_dat->pdev->dev,
"%s destroy_workqueue invoked successfully\n",
__func__);
}
/* disable interrupts & free IRQ */
if (board_dat->irq_reg_sts) {
/* disable interrupts */
pch_spi_setclr_reg(board_dat->data->master, PCH_SPCR, 0,
PCH_ALL);
/* free IRQ */
free_irq(board_dat->pdev->irq, board_dat);
dev_dbg(&board_dat->pdev->dev,
"%s free_irq invoked successfully\n", __func__);
board_dat->irq_reg_sts = false;
}
/* unmap PCI base address */
if (board_dat->data->io_remap_addr != 0) {
pci_iounmap(board_dat->pdev, board_dat->data->io_remap_addr);
board_dat->data->io_remap_addr = 0;
dev_dbg(&board_dat->pdev->dev,
"%s pci_iounmap invoked successfully\n", __func__);
}
/* release PCI region */
if (board_dat->pci_req_sts) {
pci_release_regions(board_dat->pdev);
dev_dbg(&board_dat->pdev->dev,
"%s pci_release_regions invoked successfully\n",
__func__);
board_dat->pci_req_sts = false;
}
}
static int pch_spi_get_resources(struct pch_spi_board_data *board_dat)
static int pch_spi_get_resources(struct pch_spi_board_data *board_dat,
struct pch_spi_data *data)
{
void __iomem *io_remap_addr;
int retval;
int retval = 0;
dev_dbg(&board_dat->pdev->dev, "%s ENTRY\n", __func__);
/* create workqueue */
board_dat->data->wk = create_singlethread_workqueue(KBUILD_MODNAME);
if (!board_dat->data->wk) {
data->wk = create_singlethread_workqueue(KBUILD_MODNAME);
if (!data->wk) {
dev_err(&board_dat->pdev->dev,
"%s create_singlet hread_workqueue failed\n", __func__);
retval = -EBUSY;
goto err_return;
}
dev_dbg(&board_dat->pdev->dev,
"%s create_singlethread_workqueue success\n", __func__);
retval = pci_request_regions(board_dat->pdev, KBUILD_MODNAME);
if (retval != 0) {
dev_err(&board_dat->pdev->dev,
"%s request_region failed\n", __func__);
goto err_return;
}
board_dat->pci_req_sts = true;
io_remap_addr = pci_iomap(board_dat->pdev, 1, 0);
if (io_remap_addr == 0) {
dev_err(&board_dat->pdev->dev,
"%s pci_iomap failed\n", __func__);
retval = -ENOMEM;
goto err_return;
}
/* calculate base address for all channels */
board_dat->data->io_remap_addr = io_remap_addr;
/* reset PCH SPI h/w */
pch_spi_reset(board_dat->data->master);
pch_spi_reset(data->master);
dev_dbg(&board_dat->pdev->dev,
"%s pch_spi_reset invoked successfully\n", __func__);
/* register IRQ */
retval = request_irq(board_dat->pdev->irq, pch_spi_handler,
IRQF_SHARED, KBUILD_MODNAME, board_dat);
if (retval != 0) {
dev_err(&board_dat->pdev->dev,
"%s request_irq failed\n", __func__);
goto err_return;
}
dev_dbg(&board_dat->pdev->dev, "%s request_irq returned=%d\n",
__func__, retval);
board_dat->irq_reg_sts = true;
dev_dbg(&board_dat->pdev->dev, "%s data->irq_reg_sts=true\n", __func__);
err_return:
if (retval != 0) {
dev_err(&board_dat->pdev->dev,
"%s FAIL:invoking pch_spi_free_resources\n", __func__);
pch_spi_free_resources(board_dat);
pch_spi_free_resources(board_dat, data);
}
dev_dbg(&board_dat->pdev->dev, "%s Return=%d\n", __func__, retval);
@ -986,255 +939,343 @@ err_return:
return retval;
}
static int pch_spi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
static int __devinit pch_spi_pd_probe(struct platform_device *plat_dev)
{
int ret;
struct spi_master *master;
struct pch_spi_board_data *board_dat = dev_get_platdata(&plat_dev->dev);
struct pch_spi_data *data;
struct pch_spi_board_data *board_dat;
int retval;
dev_dbg(&pdev->dev, "%s ENTRY\n", __func__);
/* allocate memory for private data */
board_dat = kzalloc(sizeof(struct pch_spi_board_data), GFP_KERNEL);
if (board_dat == NULL) {
dev_err(&pdev->dev,
" %s memory allocation for private data failed\n",
__func__);
retval = -ENOMEM;
goto err_kmalloc;
master = spi_alloc_master(&board_dat->pdev->dev,
sizeof(struct pch_spi_data));
if (!master) {
dev_err(&plat_dev->dev, "spi_alloc_master[%d] failed.\n",
plat_dev->id);
return -ENOMEM;
}
dev_dbg(&pdev->dev,
"%s memory allocation for private data success\n", __func__);
data = spi_master_get_devdata(master);
data->master = master;
/* enable PCI device */
retval = pci_enable_device(pdev);
if (retval != 0) {
dev_err(&pdev->dev, "%s pci_enable_device FAILED\n", __func__);
platform_set_drvdata(plat_dev, data);
goto err_pci_en_device;
/* baseaddress + 0x20(offset) */
data->io_remap_addr = pci_iomap(board_dat->pdev, 1, 0) +
0x20 * plat_dev->id;
if (!data->io_remap_addr) {
dev_err(&plat_dev->dev, "%s pci_iomap failed\n", __func__);
ret = -ENOMEM;
goto err_pci_iomap;
}
dev_dbg(&pdev->dev, "%s pci_enable_device returned=%d\n",
__func__, retval);
board_dat->pdev = pdev;
/* alllocate memory for SPI master */
master = spi_alloc_master(&pdev->dev, sizeof(struct pch_spi_data));
if (master == NULL) {
retval = -ENOMEM;
dev_err(&pdev->dev, "%s Fail.\n", __func__);
goto err_spi_alloc_master;
}
dev_dbg(&pdev->dev,
"%s spi_alloc_master returned non NULL\n", __func__);
dev_dbg(&plat_dev->dev, "[ch%d] remap_addr=%p\n",
plat_dev->id, data->io_remap_addr);
/* initialize members of SPI master */
master->bus_num = -1;
master->num_chipselect = PCH_MAX_CS;
master->setup = pch_spi_setup;
master->transfer = pch_spi_transfer;
dev_dbg(&pdev->dev,
"%s transfer member of SPI master initialized\n", __func__);
board_dat->data = spi_master_get_devdata(master);
data->board_dat = board_dat;
data->plat_dev = plat_dev;
data->n_curnt_chip = 255;
data->status = STATUS_RUNNING;
data->ch = plat_dev->id;
board_dat->data->master = master;
board_dat->data->n_curnt_chip = 255;
board_dat->data->board_dat = board_dat;
board_dat->data->status = STATUS_RUNNING;
INIT_LIST_HEAD(&data->queue);
spin_lock_init(&data->lock);
INIT_WORK(&data->work, pch_spi_process_messages);
init_waitqueue_head(&data->wait);
INIT_LIST_HEAD(&board_dat->data->queue);
spin_lock_init(&board_dat->data->lock);
INIT_WORK(&board_dat->data->work, pch_spi_process_messages);
init_waitqueue_head(&board_dat->data->wait);
/* allocate resources for PCH SPI */
retval = pch_spi_get_resources(board_dat);
if (retval) {
dev_err(&pdev->dev, "%s fail(retval=%d)\n", __func__, retval);
ret = pch_spi_get_resources(board_dat, data);
if (ret) {
dev_err(&plat_dev->dev, "%s fail(retval=%d)\n", __func__, ret);
goto err_spi_get_resources;
}
dev_dbg(&pdev->dev, "%s pch_spi_get_resources returned=%d\n",
__func__, retval);
/* save private data in dev */
pci_set_drvdata(pdev, board_dat);
dev_dbg(&pdev->dev, "%s invoked pci_set_drvdata\n", __func__);
/* set master mode */
pch_spi_set_master_mode(master);
dev_dbg(&pdev->dev,
"%s invoked pch_spi_set_master_mode\n", __func__);
/* Register the controller with the SPI core. */
retval = spi_register_master(master);
if (retval != 0) {
dev_err(&pdev->dev,
"%s spi_register_master FAILED\n", __func__);
goto err_spi_reg_master;
ret = request_irq(board_dat->pdev->irq, pch_spi_handler,
IRQF_SHARED, KBUILD_MODNAME, data);
if (ret) {
dev_err(&plat_dev->dev,
"%s request_irq failed\n", __func__);
goto err_request_irq;
}
data->irq_reg_sts = true;
dev_dbg(&pdev->dev, "%s spi_register_master returned=%d\n",
__func__, retval);
pch_spi_set_master_mode(master);
ret = spi_register_master(master);
if (ret != 0) {
dev_err(&plat_dev->dev,
"%s spi_register_master FAILED\n", __func__);
goto err_spi_register_master;
}
return 0;
err_spi_reg_master:
spi_unregister_master(master);
err_spi_register_master:
free_irq(board_dat->pdev->irq, board_dat);
err_request_irq:
pch_spi_free_resources(board_dat, data);
err_spi_get_resources:
err_spi_alloc_master:
pci_iounmap(board_dat->pdev, data->io_remap_addr);
err_pci_iomap:
spi_master_put(master);
pci_disable_device(pdev);
err_pci_en_device:
kfree(board_dat);
err_kmalloc:
return retval;
return ret;
}
static void pch_spi_remove(struct pci_dev *pdev)
static int __devexit pch_spi_pd_remove(struct platform_device *plat_dev)
{
struct pch_spi_board_data *board_dat = pci_get_drvdata(pdev);
struct pch_spi_board_data *board_dat = dev_get_platdata(&plat_dev->dev);
struct pch_spi_data *data = platform_get_drvdata(plat_dev);
int count;
dev_dbg(&pdev->dev, "%s ENTRY\n", __func__);
if (!board_dat) {
dev_err(&pdev->dev,
"%s pci_get_drvdata returned NULL\n", __func__);
return;
}
dev_dbg(&plat_dev->dev, "%s:[ch%d] irq=%d\n",
__func__, plat_dev->id, board_dat->pdev->irq);
/* check for any pending messages; no action is taken if the queue
* is still full; but at least we tried. Unload anyway */
count = 500;
spin_lock(&board_dat->data->lock);
board_dat->data->status = STATUS_EXITING;
while ((list_empty(&board_dat->data->queue) == 0) && --count) {
spin_lock(&data->lock);
data->status = STATUS_EXITING;
while ((list_empty(&data->queue) == 0) && --count) {
dev_dbg(&board_dat->pdev->dev, "%s :queue not empty\n",
__func__);
spin_unlock(&board_dat->data->lock);
spin_unlock(&data->lock);
msleep(PCH_SLEEP_TIME);
spin_lock(&board_dat->data->lock);
spin_lock(&data->lock);
}
spin_unlock(&board_dat->data->lock);
spin_unlock(&data->lock);
/* Free resources allocated for PCH SPI */
pch_spi_free_resources(board_dat);
pch_spi_free_resources(board_dat, data);
/* disable interrupts & free IRQ */
if (data->irq_reg_sts) {
/* disable interrupts */
pch_spi_setclr_reg(data->master, PCH_SPCR, 0, PCH_ALL);
data->irq_reg_sts = false;
free_irq(board_dat->pdev->irq, data);
}
spi_unregister_master(board_dat->data->master);
pci_iounmap(board_dat->pdev, data->io_remap_addr);
spi_unregister_master(data->master);
spi_master_put(data->master);
platform_set_drvdata(plat_dev, NULL);
/* free memory for private data */
kfree(board_dat);
return 0;
}
#ifdef CONFIG_PM
static int pch_spi_pd_suspend(struct platform_device *pd_dev,
pm_message_t state)
{
u8 count;
struct pch_spi_board_data *board_dat = dev_get_platdata(&pd_dev->dev);
struct pch_spi_data *data = platform_get_drvdata(pd_dev);
pci_set_drvdata(pdev, NULL);
dev_dbg(&pd_dev->dev, "%s ENTRY\n", __func__);
/* disable PCI device */
if (!board_dat) {
dev_err(&pd_dev->dev,
"%s pci_get_drvdata returned NULL\n", __func__);
return -EFAULT;
}
/* check if the current message is processed:
Only after thats done the transfer will be suspended */
count = 255;
while ((--count) > 0)
if (!(data->bcurrent_msg_processing)) {
break;
msleep(PCH_SLEEP_TIME);
}
/* Free IRQ */
if (data->irq_reg_sts) {
/* disable all interrupts */
pch_spi_setclr_reg(data->master, PCH_SPCR, 0, PCH_ALL);
pch_spi_reset(data->master);
free_irq(board_dat->pdev->irq, data);
data->irq_reg_sts = false;
dev_dbg(&pd_dev->dev,
"%s free_irq invoked successfully.\n", __func__);
}
return 0;
}
static int pch_spi_pd_resume(struct platform_device *pd_dev)
{
struct pch_spi_board_data *board_dat = dev_get_platdata(&pd_dev->dev);
struct pch_spi_data *data = platform_get_drvdata(pd_dev);
int retval;
if (!board_dat) {
dev_err(&pd_dev->dev,
"%s pci_get_drvdata returned NULL\n", __func__);
return -EFAULT;
}
if (!data->irq_reg_sts) {
/* register IRQ */
retval = request_irq(board_dat->pdev->irq, pch_spi_handler,
IRQF_SHARED, KBUILD_MODNAME, data);
if (retval < 0) {
dev_err(&pd_dev->dev,
"%s request_irq failed\n", __func__);
return retval;
}
/* reset PCH SPI h/w */
pch_spi_reset(data->master);
pch_spi_set_master_mode(data->master);
data->irq_reg_sts = true;
}
return 0;
}
#else
#define pch_spi_pd_suspend NULL
#define pch_spi_pd_resume NULL
#endif
static struct platform_driver pch_spi_pd_driver = {
.driver = {
.name = "pch-spi",
.owner = THIS_MODULE,
},
.probe = pch_spi_pd_probe,
.remove = __devexit_p(pch_spi_pd_remove),
.suspend = pch_spi_pd_suspend,
.resume = pch_spi_pd_resume
};
static int __devinit pch_spi_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
struct pch_spi_board_data *board_dat;
struct platform_device *pd_dev = NULL;
int retval;
int i;
struct pch_pd_dev_save *pd_dev_save;
pd_dev_save = kzalloc(sizeof(struct pch_pd_dev_save), GFP_KERNEL);
if (!pd_dev_save) {
dev_err(&pdev->dev, "%s Can't allocate pd_dev_sav\n", __func__);
return -ENOMEM;
}
board_dat = kzalloc(sizeof(struct pch_spi_board_data), GFP_KERNEL);
if (!board_dat) {
dev_err(&pdev->dev, "%s Can't allocate board_dat\n", __func__);
retval = -ENOMEM;
goto err_no_mem;
}
retval = pci_request_regions(pdev, KBUILD_MODNAME);
if (retval) {
dev_err(&pdev->dev, "%s request_region failed\n", __func__);
goto pci_request_regions;
}
board_dat->pdev = pdev;
board_dat->num = id->driver_data;
pd_dev_save->num = id->driver_data;
pd_dev_save->board_dat = board_dat;
retval = pci_enable_device(pdev);
if (retval) {
dev_err(&pdev->dev, "%s pci_enable_device failed\n", __func__);
goto pci_enable_device;
}
for (i = 0; i < board_dat->num; i++) {
pd_dev = platform_device_alloc("pch-spi", i);
if (!pd_dev) {
dev_err(&pdev->dev, "platform_device_alloc failed\n");
goto err_platform_device;
}
pd_dev_save->pd_save[i] = pd_dev;
pd_dev->dev.parent = &pdev->dev;
retval = platform_device_add_data(pd_dev, board_dat,
sizeof(*board_dat));
if (retval) {
dev_err(&pdev->dev,
"platform_device_add_data failed\n");
platform_device_put(pd_dev);
goto err_platform_device;
}
retval = platform_device_add(pd_dev);
if (retval) {
dev_err(&pdev->dev, "platform_device_add failed\n");
platform_device_put(pd_dev);
goto err_platform_device;
}
}
pci_set_drvdata(pdev, pd_dev_save);
return 0;
err_platform_device:
pci_disable_device(pdev);
pci_enable_device:
pci_release_regions(pdev);
pci_request_regions:
kfree(board_dat);
err_no_mem:
kfree(pd_dev_save);
dev_dbg(&pdev->dev, "%s invoked pci_disable_device\n", __func__);
return retval;
}
static void __devexit pch_spi_remove(struct pci_dev *pdev)
{
int i;
struct pch_pd_dev_save *pd_dev_save = pci_get_drvdata(pdev);
dev_dbg(&pdev->dev, "%s ENTRY:pdev=%p\n", __func__, pdev);
for (i = 0; i < pd_dev_save->num; i++)
platform_device_unregister(pd_dev_save->pd_save[i]);
pci_disable_device(pdev);
pci_release_regions(pdev);
kfree(pd_dev_save->board_dat);
kfree(pd_dev_save);
}
#ifdef CONFIG_PM
static int pch_spi_suspend(struct pci_dev *pdev, pm_message_t state)
{
u8 count;
int retval;
struct pch_spi_board_data *board_dat = pci_get_drvdata(pdev);
struct pch_pd_dev_save *pd_dev_save = pci_get_drvdata(pdev);
dev_dbg(&pdev->dev, "%s ENTRY\n", __func__);
if (!board_dat) {
dev_err(&pdev->dev,
"%s pci_get_drvdata returned NULL\n", __func__);
return -EFAULT;
}
retval = 0;
board_dat->suspend_sts = true;
/* check if the current message is processed:
Only after thats done the transfer will be suspended */
count = 255;
while ((--count) > 0) {
if (!(board_dat->data->bcurrent_msg_processing)) {
dev_dbg(&pdev->dev, "%s board_dat->data->bCurrent_"
"msg_processing = false\n", __func__);
break;
} else {
dev_dbg(&pdev->dev, "%s board_dat->data->bCurrent_msg_"
"processing = true\n", __func__);
}
msleep(PCH_SLEEP_TIME);
}
/* Free IRQ */
if (board_dat->irq_reg_sts) {
/* disable all interrupts */
pch_spi_setclr_reg(board_dat->data->master, PCH_SPCR, 0,
PCH_ALL);
pch_spi_reset(board_dat->data->master);
free_irq(board_dat->pdev->irq, board_dat);
board_dat->irq_reg_sts = false;
dev_dbg(&pdev->dev,
"%s free_irq invoked successfully.\n", __func__);
}
pd_dev_save->board_dat->suspend_sts = true;
/* save config space */
retval = pci_save_state(pdev);
if (retval == 0) {
dev_dbg(&pdev->dev, "%s pci_save_state returned=%d\n",
__func__, retval);
/* disable PM notifications */
pci_enable_wake(pdev, PCI_D3hot, 0);
dev_dbg(&pdev->dev,
"%s pci_enable_wake invoked successfully\n", __func__);
/* disable PCI device */
pci_disable_device(pdev);
dev_dbg(&pdev->dev,
"%s pci_disable_device invoked successfully\n",
__func__);
/* move device to D3hot state */
pci_set_power_state(pdev, PCI_D3hot);
dev_dbg(&pdev->dev,
"%s pci_set_power_state invoked successfully\n",
__func__);
} else {
dev_err(&pdev->dev, "%s pci_save_state failed\n", __func__);
}
dev_dbg(&pdev->dev, "%s return=%d\n", __func__, retval);
return retval;
}
static int pch_spi_resume(struct pci_dev *pdev)
{
int retval;
struct pch_spi_board_data *board = pci_get_drvdata(pdev);
struct pch_pd_dev_save *pd_dev_save = pci_get_drvdata(pdev);
dev_dbg(&pdev->dev, "%s ENTRY\n", __func__);
if (!board) {
dev_err(&pdev->dev,
"%s pci_get_drvdata returned NULL\n", __func__);
return -EFAULT;
}
/* move device to DO power state */
pci_set_power_state(pdev, PCI_D0);
/* restore state */
pci_restore_state(pdev);
retval = pci_enable_device(pdev);
@ -1242,34 +1283,12 @@ static int pch_spi_resume(struct pci_dev *pdev)
dev_err(&pdev->dev,
"%s pci_enable_device failed\n", __func__);
} else {
/* disable PM notifications */
pci_enable_wake(pdev, PCI_D3hot, 0);
/* register IRQ handler */
if (!board->irq_reg_sts) {
/* register IRQ */
retval = request_irq(board->pdev->irq, pch_spi_handler,
IRQF_SHARED, KBUILD_MODNAME,
board);
if (retval < 0) {
dev_err(&pdev->dev,
"%s request_irq failed\n", __func__);
return retval;
}
board->irq_reg_sts = true;
/* reset PCH SPI h/w */
pch_spi_reset(board->data->master);
pch_spi_set_master_mode(board->data->master);
/* set suspend status to false */
board->suspend_sts = false;
}
/* set suspend status to false */
pd_dev_save->board_dat->suspend_sts = false;
}
dev_dbg(&pdev->dev, "%s returning=%d\n", __func__, retval);
return retval;
}
#else
@ -1289,15 +1308,25 @@ static struct pci_driver pch_spi_pcidev = {
static int __init pch_spi_init(void)
{
return pci_register_driver(&pch_spi_pcidev);
int ret;
ret = platform_driver_register(&pch_spi_pd_driver);
if (ret)
return ret;
ret = pci_register_driver(&pch_spi_pcidev);
if (ret)
return ret;
return 0;
}
module_init(pch_spi_init);
static void __exit pch_spi_exit(void)
{
pci_unregister_driver(&pch_spi_pcidev);
platform_driver_unregister(&pch_spi_pd_driver);
}
module_exit(pch_spi_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Topcliff PCH SPI PCI Driver");
MODULE_DESCRIPTION("Intel EG20T PCH/OKI SEMICONDUCTOR ML7213 IOH SPI Driver");