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tty: serial: owl: Implement console driver
Implement serial console driver to complement earlycon. Based on LeMaker linux-actions tree. Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andreas Färber
Greg Kroah-Hartman
parent
5771a8c088
commit
fc60a8b675
@ -1689,7 +1689,7 @@ config SERIAL_MVEBU_CONSOLE
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Otherwise, say 'N'.
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config SERIAL_OWL
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bool "Actions Semi Owl serial port support"
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tristate "Actions Semi Owl serial port support"
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depends on ARCH_ACTIONS || COMPILE_TEST
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select SERIAL_CORE
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help
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@ -1705,7 +1705,7 @@ config SERIAL_OWL_CONSOLE
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default y
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help
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Say 'Y' here if you wish to use Actions Semiconductor S500/S900 UART
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as the system console. Only earlycon is implemented currently.
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as the system console.
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endmenu
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@ -20,6 +20,7 @@
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/clk.h>
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#include <linux/console.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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@ -28,22 +29,66 @@
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#include <linux/platform_device.h>
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#include <linux/serial.h>
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#include <linux/serial_core.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#define OWL_UART_PORT_NUM 7
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#define OWL_UART_DEV_NAME "ttyOWL"
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#define OWL_UART_CTL 0x000
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#define OWL_UART_RXDAT 0x004
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#define OWL_UART_TXDAT 0x008
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#define OWL_UART_STAT 0x00c
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#define OWL_UART_CTL_DWLS_MASK GENMASK(1, 0)
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#define OWL_UART_CTL_DWLS_5BITS (0x0 << 0)
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#define OWL_UART_CTL_DWLS_6BITS (0x1 << 0)
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#define OWL_UART_CTL_DWLS_7BITS (0x2 << 0)
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#define OWL_UART_CTL_DWLS_8BITS (0x3 << 0)
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#define OWL_UART_CTL_STPS_2BITS BIT(2)
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#define OWL_UART_CTL_PRS_MASK GENMASK(6, 4)
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#define OWL_UART_CTL_PRS_NONE (0x0 << 4)
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#define OWL_UART_CTL_PRS_ODD (0x4 << 4)
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#define OWL_UART_CTL_PRS_MARK (0x5 << 4)
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#define OWL_UART_CTL_PRS_EVEN (0x6 << 4)
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#define OWL_UART_CTL_PRS_SPACE (0x7 << 4)
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#define OWL_UART_CTL_AFE BIT(12)
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#define OWL_UART_CTL_TRFS_TX BIT(14)
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#define OWL_UART_CTL_EN BIT(15)
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#define OWL_UART_CTL_RXDE BIT(16)
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#define OWL_UART_CTL_TXDE BIT(17)
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#define OWL_UART_CTL_RXIE BIT(18)
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#define OWL_UART_CTL_TXIE BIT(19)
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#define OWL_UART_CTL_LBEN BIT(20)
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#define OWL_UART_STAT_RIP BIT(0)
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#define OWL_UART_STAT_TIP BIT(1)
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#define OWL_UART_STAT_RXER BIT(2)
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#define OWL_UART_STAT_TFER BIT(3)
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#define OWL_UART_STAT_RXST BIT(4)
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#define OWL_UART_STAT_RFEM BIT(5)
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#define OWL_UART_STAT_TFFU BIT(6)
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#define OWL_UART_STAT_TRFL_MASK (0x1f << 11)
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#define OWL_UART_STAT_CTSS BIT(7)
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#define OWL_UART_STAT_RTSS BIT(8)
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#define OWL_UART_STAT_TFES BIT(10)
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#define OWL_UART_STAT_TRFL_MASK GENMASK(16, 11)
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#define OWL_UART_STAT_UTBB BIT(17)
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static struct uart_driver owl_uart_driver;
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struct owl_uart_info {
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unsigned int tx_fifosize;
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};
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struct owl_uart_port {
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struct uart_port port;
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struct clk *clk;
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};
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#define to_owl_uart_port(prt) container_of(prt, struct owl_uart_port, prt)
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static struct owl_uart_port *owl_uart_ports[OWL_UART_PORT_NUM];
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static inline void owl_uart_write(struct uart_port *port, u32 val, unsigned int off)
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{
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writel(val, port->membase + off);
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@ -54,6 +99,397 @@ static inline u32 owl_uart_read(struct uart_port *port, unsigned int off)
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return readl(port->membase + off);
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}
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static void owl_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
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{
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u32 ctl;
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ctl = owl_uart_read(port, OWL_UART_CTL);
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if (mctrl & TIOCM_LOOP)
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ctl |= OWL_UART_CTL_LBEN;
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else
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ctl &= ~OWL_UART_CTL_LBEN;
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owl_uart_write(port, ctl, OWL_UART_CTL);
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}
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static unsigned int owl_uart_get_mctrl(struct uart_port *port)
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{
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unsigned int mctrl = TIOCM_CAR | TIOCM_DSR;
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u32 stat, ctl;
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ctl = owl_uart_read(port, OWL_UART_CTL);
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stat = owl_uart_read(port, OWL_UART_STAT);
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if (stat & OWL_UART_STAT_RTSS)
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mctrl |= TIOCM_RTS;
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if ((stat & OWL_UART_STAT_CTSS) || !(ctl & OWL_UART_CTL_AFE))
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mctrl |= TIOCM_CTS;
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return mctrl;
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}
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static unsigned int owl_uart_tx_empty(struct uart_port *port)
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{
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unsigned long flags;
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u32 val;
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unsigned int ret;
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spin_lock_irqsave(&port->lock, flags);
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val = owl_uart_read(port, OWL_UART_STAT);
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ret = (val & OWL_UART_STAT_TFES) ? TIOCSER_TEMT : 0;
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spin_unlock_irqrestore(&port->lock, flags);
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return ret;
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}
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static void owl_uart_stop_rx(struct uart_port *port)
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{
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u32 val;
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val = owl_uart_read(port, OWL_UART_CTL);
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val &= ~(OWL_UART_CTL_RXIE | OWL_UART_CTL_RXDE);
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owl_uart_write(port, val, OWL_UART_CTL);
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val = owl_uart_read(port, OWL_UART_STAT);
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val |= OWL_UART_STAT_RIP;
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owl_uart_write(port, val, OWL_UART_STAT);
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}
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static void owl_uart_stop_tx(struct uart_port *port)
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{
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u32 val;
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val = owl_uart_read(port, OWL_UART_CTL);
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val &= ~(OWL_UART_CTL_TXIE | OWL_UART_CTL_TXDE);
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owl_uart_write(port, val, OWL_UART_CTL);
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val = owl_uart_read(port, OWL_UART_STAT);
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val |= OWL_UART_STAT_TIP;
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owl_uart_write(port, val, OWL_UART_STAT);
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}
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static void owl_uart_start_tx(struct uart_port *port)
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{
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u32 val;
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if (uart_tx_stopped(port)) {
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owl_uart_stop_tx(port);
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return;
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}
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val = owl_uart_read(port, OWL_UART_STAT);
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val |= OWL_UART_STAT_TIP;
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owl_uart_write(port, val, OWL_UART_STAT);
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val = owl_uart_read(port, OWL_UART_CTL);
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val |= OWL_UART_CTL_TXIE;
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owl_uart_write(port, val, OWL_UART_CTL);
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}
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static void owl_uart_send_chars(struct uart_port *port)
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{
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struct circ_buf *xmit = &port->state->xmit;
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unsigned int ch;
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if (uart_tx_stopped(port))
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return;
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if (port->x_char) {
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while (!(owl_uart_read(port, OWL_UART_STAT) & OWL_UART_STAT_TFFU))
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cpu_relax();
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owl_uart_write(port, port->x_char, OWL_UART_TXDAT);
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port->icount.tx++;
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port->x_char = 0;
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}
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while (!(owl_uart_read(port, OWL_UART_STAT) & OWL_UART_STAT_TFFU)) {
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if (uart_circ_empty(xmit))
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break;
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ch = xmit->buf[xmit->tail];
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owl_uart_write(port, ch, OWL_UART_TXDAT);
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xmit->tail = (xmit->tail + 1) & (SERIAL_XMIT_SIZE - 1);
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port->icount.tx++;
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}
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if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
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uart_write_wakeup(port);
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if (uart_circ_empty(xmit))
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owl_uart_stop_tx(port);
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}
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static void owl_uart_receive_chars(struct uart_port *port)
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{
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u32 stat, val;
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val = owl_uart_read(port, OWL_UART_CTL);
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val &= ~OWL_UART_CTL_TRFS_TX;
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owl_uart_write(port, val, OWL_UART_CTL);
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stat = owl_uart_read(port, OWL_UART_STAT);
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while (!(stat & OWL_UART_STAT_RFEM)) {
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char flag = TTY_NORMAL;
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if (stat & OWL_UART_STAT_RXER)
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port->icount.overrun++;
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if (stat & OWL_UART_STAT_RXST) {
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/* We are not able to distinguish the error type. */
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port->icount.brk++;
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port->icount.frame++;
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stat &= port->read_status_mask;
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if (stat & OWL_UART_STAT_RXST)
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flag = TTY_PARITY;
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} else
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port->icount.rx++;
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val = owl_uart_read(port, OWL_UART_RXDAT);
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val &= 0xff;
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if ((stat & port->ignore_status_mask) == 0)
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tty_insert_flip_char(&port->state->port, val, flag);
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stat = owl_uart_read(port, OWL_UART_STAT);
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}
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spin_unlock(&port->lock);
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tty_flip_buffer_push(&port->state->port);
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spin_lock(&port->lock);
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}
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static irqreturn_t owl_uart_irq(int irq, void *dev_id)
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{
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struct uart_port *port = dev_id;
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unsigned long flags;
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u32 stat;
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spin_lock_irqsave(&port->lock, flags);
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stat = owl_uart_read(port, OWL_UART_STAT);
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if (stat & OWL_UART_STAT_RIP)
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owl_uart_receive_chars(port);
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if (stat & OWL_UART_STAT_TIP)
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owl_uart_send_chars(port);
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stat = owl_uart_read(port, OWL_UART_STAT);
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stat |= OWL_UART_STAT_RIP | OWL_UART_STAT_TIP;
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owl_uart_write(port, stat, OWL_UART_STAT);
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spin_unlock_irqrestore(&port->lock, flags);
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return IRQ_HANDLED;
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}
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static void owl_uart_shutdown(struct uart_port *port)
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{
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u32 val;
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unsigned long flags;
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spin_lock_irqsave(&port->lock, flags);
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val = owl_uart_read(port, OWL_UART_CTL);
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val &= ~(OWL_UART_CTL_TXIE | OWL_UART_CTL_RXIE
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| OWL_UART_CTL_TXDE | OWL_UART_CTL_RXDE | OWL_UART_CTL_EN);
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owl_uart_write(port, val, OWL_UART_CTL);
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spin_unlock_irqrestore(&port->lock, flags);
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free_irq(port->irq, port);
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}
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static int owl_uart_startup(struct uart_port *port)
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{
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u32 val;
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unsigned long flags;
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int ret;
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ret = request_irq(port->irq, owl_uart_irq, IRQF_TRIGGER_HIGH,
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"owl-uart", port);
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if (ret)
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return ret;
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spin_lock_irqsave(&port->lock, flags);
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val = owl_uart_read(port, OWL_UART_STAT);
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val |= OWL_UART_STAT_RIP | OWL_UART_STAT_TIP
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| OWL_UART_STAT_RXER | OWL_UART_STAT_TFER | OWL_UART_STAT_RXST;
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owl_uart_write(port, val, OWL_UART_STAT);
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val = owl_uart_read(port, OWL_UART_CTL);
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val |= OWL_UART_CTL_RXIE | OWL_UART_CTL_TXIE;
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val |= OWL_UART_CTL_EN;
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owl_uart_write(port, val, OWL_UART_CTL);
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spin_unlock_irqrestore(&port->lock, flags);
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return 0;
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}
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static void owl_uart_change_baudrate(struct owl_uart_port *owl_port,
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unsigned long baud)
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{
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clk_set_rate(owl_port->clk, baud * 8);
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}
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static void owl_uart_set_termios(struct uart_port *port,
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struct ktermios *termios,
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struct ktermios *old)
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{
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struct owl_uart_port *owl_port = to_owl_uart_port(port);
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unsigned int baud;
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u32 ctl;
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unsigned long flags;
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spin_lock_irqsave(&port->lock, flags);
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ctl = owl_uart_read(port, OWL_UART_CTL);
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ctl &= ~OWL_UART_CTL_DWLS_MASK;
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switch (termios->c_cflag & CSIZE) {
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case CS5:
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ctl |= OWL_UART_CTL_DWLS_5BITS;
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break;
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case CS6:
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ctl |= OWL_UART_CTL_DWLS_6BITS;
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break;
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case CS7:
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ctl |= OWL_UART_CTL_DWLS_7BITS;
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break;
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case CS8:
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default:
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ctl |= OWL_UART_CTL_DWLS_8BITS;
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break;
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}
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if (termios->c_cflag & CSTOPB)
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ctl |= OWL_UART_CTL_STPS_2BITS;
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else
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ctl &= ~OWL_UART_CTL_STPS_2BITS;
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ctl &= ~OWL_UART_CTL_PRS_MASK;
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if (termios->c_cflag & PARENB) {
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if (termios->c_cflag & CMSPAR) {
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if (termios->c_cflag & PARODD)
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ctl |= OWL_UART_CTL_PRS_MARK;
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else
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ctl |= OWL_UART_CTL_PRS_SPACE;
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} else if (termios->c_cflag & PARODD)
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ctl |= OWL_UART_CTL_PRS_ODD;
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else
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ctl |= OWL_UART_CTL_PRS_EVEN;
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} else
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ctl |= OWL_UART_CTL_PRS_NONE;
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if (termios->c_cflag & CRTSCTS)
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ctl |= OWL_UART_CTL_AFE;
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else
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ctl &= ~OWL_UART_CTL_AFE;
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owl_uart_write(port, ctl, OWL_UART_CTL);
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baud = uart_get_baud_rate(port, termios, old, 9600, 3200000);
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owl_uart_change_baudrate(owl_port, baud);
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/* Don't rewrite B0 */
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if (tty_termios_baud_rate(termios))
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tty_termios_encode_baud_rate(termios, baud, baud);
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port->read_status_mask |= OWL_UART_STAT_RXER;
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if (termios->c_iflag & INPCK)
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port->read_status_mask |= OWL_UART_STAT_RXST;
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uart_update_timeout(port, termios->c_cflag, baud);
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spin_unlock_irqrestore(&port->lock, flags);
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}
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static void owl_uart_release_port(struct uart_port *port)
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{
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struct platform_device *pdev = to_platform_device(port->dev);
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struct resource *res;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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return;
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if (port->flags & UPF_IOREMAP) {
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devm_release_mem_region(port->dev, port->mapbase,
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resource_size(res));
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devm_iounmap(port->dev, port->membase);
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port->membase = NULL;
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}
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}
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static int owl_uart_request_port(struct uart_port *port)
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{
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struct platform_device *pdev = to_platform_device(port->dev);
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struct resource *res;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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return -ENXIO;
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if (!devm_request_mem_region(port->dev, port->mapbase,
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resource_size(res), dev_name(port->dev)))
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return -EBUSY;
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if (port->flags & UPF_IOREMAP) {
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port->membase = devm_ioremap_nocache(port->dev, port->mapbase,
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resource_size(res));
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if (!port->membase)
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return -EBUSY;
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}
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return 0;
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}
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static const char *owl_uart_type(struct uart_port *port)
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{
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return (port->type == PORT_OWL) ? "owl-uart" : NULL;
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}
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|
||||
static int owl_uart_verify_port(struct uart_port *port,
|
||||
struct serial_struct *ser)
|
||||
{
|
||||
if (port->type != PORT_OWL)
|
||||
return -EINVAL;
|
||||
|
||||
if (port->irq != ser->irq)
|
||||
return -EINVAL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void owl_uart_config_port(struct uart_port *port, int flags)
|
||||
{
|
||||
if (flags & UART_CONFIG_TYPE) {
|
||||
port->type = PORT_OWL;
|
||||
owl_uart_request_port(port);
|
||||
}
|
||||
}
|
||||
|
||||
static struct uart_ops owl_uart_ops = {
|
||||
.set_mctrl = owl_uart_set_mctrl,
|
||||
.get_mctrl = owl_uart_get_mctrl,
|
||||
.tx_empty = owl_uart_tx_empty,
|
||||
.start_tx = owl_uart_start_tx,
|
||||
.stop_rx = owl_uart_stop_rx,
|
||||
.stop_tx = owl_uart_stop_tx,
|
||||
.startup = owl_uart_startup,
|
||||
.shutdown = owl_uart_shutdown,
|
||||
.set_termios = owl_uart_set_termios,
|
||||
.type = owl_uart_type,
|
||||
.config_port = owl_uart_config_port,
|
||||
.request_port = owl_uart_request_port,
|
||||
.release_port = owl_uart_release_port,
|
||||
.verify_port = owl_uart_verify_port,
|
||||
};
|
||||
|
||||
#ifdef CONFIG_SERIAL_OWL_CONSOLE
|
||||
|
||||
static void owl_console_putchar(struct uart_port *port, int ch)
|
||||
@ -110,6 +546,57 @@ static void owl_uart_port_write(struct uart_port *port, const char *s,
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
static void owl_uart_console_write(struct console *co, const char *s,
|
||||
u_int count)
|
||||
{
|
||||
struct owl_uart_port *owl_port;
|
||||
|
||||
owl_port = owl_uart_ports[co->index];
|
||||
if (!owl_port)
|
||||
return;
|
||||
|
||||
owl_uart_port_write(&owl_port->port, s, count);
|
||||
}
|
||||
|
||||
static int owl_uart_console_setup(struct console *co, char *options)
|
||||
{
|
||||
struct owl_uart_port *owl_port;
|
||||
int baud = 115200;
|
||||
int bits = 8;
|
||||
int parity = 'n';
|
||||
int flow = 'n';
|
||||
|
||||
if (co->index < 0 || co->index >= OWL_UART_PORT_NUM)
|
||||
return -EINVAL;
|
||||
|
||||
owl_port = owl_uart_ports[co->index];
|
||||
if (!owl_port || !owl_port->port.membase)
|
||||
return -ENODEV;
|
||||
|
||||
if (options)
|
||||
uart_parse_options(options, &baud, &parity, &bits, &flow);
|
||||
|
||||
return uart_set_options(&owl_port->port, co, baud, parity, bits, flow);
|
||||
}
|
||||
|
||||
static struct console owl_uart_console = {
|
||||
.name = OWL_UART_DEV_NAME,
|
||||
.write = owl_uart_console_write,
|
||||
.device = uart_console_device,
|
||||
.setup = owl_uart_console_setup,
|
||||
.flags = CON_PRINTBUFFER,
|
||||
.index = -1,
|
||||
.data = &owl_uart_driver,
|
||||
};
|
||||
|
||||
static int __init owl_uart_console_init(void)
|
||||
{
|
||||
register_console(&owl_uart_console);
|
||||
|
||||
return 0;
|
||||
}
|
||||
console_initcall(owl_uart_console_init);
|
||||
|
||||
static void owl_uart_early_console_write(struct console *co,
|
||||
const char *s,
|
||||
u_int count)
|
||||
@ -132,4 +619,148 @@ owl_uart_early_console_setup(struct earlycon_device *device, const char *opt)
|
||||
OF_EARLYCON_DECLARE(owl, "actions,owl-uart",
|
||||
owl_uart_early_console_setup);
|
||||
|
||||
#endif /* CONFIG_SERIAL_OWL_CONSOLE */
|
||||
#define OWL_UART_CONSOLE (&owl_uart_console)
|
||||
#else
|
||||
#define OWL_UART_CONSOLE NULL
|
||||
#endif
|
||||
|
||||
static struct uart_driver owl_uart_driver = {
|
||||
.owner = THIS_MODULE,
|
||||
.driver_name = "owl-uart",
|
||||
.dev_name = OWL_UART_DEV_NAME,
|
||||
.nr = OWL_UART_PORT_NUM,
|
||||
.cons = OWL_UART_CONSOLE,
|
||||
};
|
||||
|
||||
static const struct owl_uart_info owl_s500_info = {
|
||||
.tx_fifosize = 16,
|
||||
};
|
||||
|
||||
static const struct owl_uart_info owl_s900_info = {
|
||||
.tx_fifosize = 32,
|
||||
};
|
||||
|
||||
static const struct of_device_id owl_uart_dt_matches[] = {
|
||||
{ .compatible = "actions,s500-uart", .data = &owl_s500_info },
|
||||
{ .compatible = "actions,s900-uart", .data = &owl_s900_info },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, owl_uart_dt_matches);
|
||||
|
||||
static int owl_uart_probe(struct platform_device *pdev)
|
||||
{
|
||||
const struct of_device_id *match;
|
||||
const struct owl_uart_info *info = NULL;
|
||||
struct resource *res_mem;
|
||||
struct owl_uart_port *owl_port;
|
||||
int ret, irq;
|
||||
|
||||
if (pdev->dev.of_node) {
|
||||
pdev->id = of_alias_get_id(pdev->dev.of_node, "serial");
|
||||
match = of_match_node(owl_uart_dt_matches, pdev->dev.of_node);
|
||||
if (match)
|
||||
info = match->data;
|
||||
}
|
||||
|
||||
if (pdev->id < 0 || pdev->id >= OWL_UART_PORT_NUM) {
|
||||
dev_err(&pdev->dev, "id %d out of range\n", pdev->id);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
if (!res_mem) {
|
||||
dev_err(&pdev->dev, "could not get mem\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
irq = platform_get_irq(pdev, 0);
|
||||
if (irq < 0) {
|
||||
dev_err(&pdev->dev, "could not get irq\n");
|
||||
return irq;
|
||||
}
|
||||
|
||||
if (owl_uart_ports[pdev->id]) {
|
||||
dev_err(&pdev->dev, "port %d already allocated\n", pdev->id);
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
owl_port = devm_kzalloc(&pdev->dev, sizeof(*owl_port), GFP_KERNEL);
|
||||
if (!owl_port)
|
||||
return -ENOMEM;
|
||||
|
||||
owl_port->clk = devm_clk_get(&pdev->dev, NULL);
|
||||
if (IS_ERR(owl_port->clk)) {
|
||||
dev_err(&pdev->dev, "could not get clk\n");
|
||||
return PTR_ERR(owl_port->clk);
|
||||
}
|
||||
|
||||
owl_port->port.dev = &pdev->dev;
|
||||
owl_port->port.line = pdev->id;
|
||||
owl_port->port.type = PORT_OWL;
|
||||
owl_port->port.iotype = UPIO_MEM;
|
||||
owl_port->port.mapbase = res_mem->start;
|
||||
owl_port->port.irq = irq;
|
||||
owl_port->port.uartclk = clk_get_rate(owl_port->clk);
|
||||
if (owl_port->port.uartclk == 0) {
|
||||
dev_err(&pdev->dev, "clock rate is zero\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
owl_port->port.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_LOW_LATENCY;
|
||||
owl_port->port.x_char = 0;
|
||||
owl_port->port.fifosize = (info) ? info->tx_fifosize : 16;
|
||||
owl_port->port.ops = &owl_uart_ops;
|
||||
|
||||
owl_uart_ports[pdev->id] = owl_port;
|
||||
platform_set_drvdata(pdev, owl_port);
|
||||
|
||||
ret = uart_add_one_port(&owl_uart_driver, &owl_port->port);
|
||||
if (ret)
|
||||
owl_uart_ports[pdev->id] = NULL;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int owl_uart_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct owl_uart_port *owl_port = platform_get_drvdata(pdev);
|
||||
|
||||
uart_remove_one_port(&owl_uart_driver, &owl_port->port);
|
||||
owl_uart_ports[pdev->id] = NULL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver owl_uart_platform_driver = {
|
||||
.probe = owl_uart_probe,
|
||||
.remove = owl_uart_remove,
|
||||
.driver = {
|
||||
.name = "owl-uart",
|
||||
.of_match_table = owl_uart_dt_matches,
|
||||
},
|
||||
};
|
||||
|
||||
static int __init owl_uart_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = uart_register_driver(&owl_uart_driver);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = platform_driver_register(&owl_uart_platform_driver);
|
||||
if (ret)
|
||||
uart_unregister_driver(&owl_uart_driver);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __init owl_uart_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&owl_uart_platform_driver);
|
||||
uart_unregister_driver(&owl_uart_driver);
|
||||
}
|
||||
|
||||
module_init(owl_uart_init);
|
||||
module_exit(owl_uart_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
@ -70,6 +70,7 @@
|
||||
#define PORT_CLPS711X 33
|
||||
#define PORT_SA1100 34
|
||||
#define PORT_UART00 35
|
||||
#define PORT_OWL 36
|
||||
#define PORT_21285 37
|
||||
|
||||
/* Sparc type numbers. */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user