* Copyright (C) 2004, 2007 Freescale Semiconductor, Inc.
* (C) 2004 Intracom, S.A.
* (C) 2005-2006 MontaVista Software, Inc.
- * Vitaly Bordug <vbordug@ru.mvista.com>
+ * Vitaly Bordug <vbordug@ru.mvista.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include <linux/bootmem.h>
#include <linux/dma-mapping.h>
#include <linux/fs_uart_pd.h>
+#include <linux/of_platform.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/fs_pd.h>
#include <asm/udbg.h>
-#ifdef CONFIG_PPC_CPM_NEW_BINDING
-#include <linux/of_platform.h>
-#endif
-
#if defined(CONFIG_SERIAL_CPM_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
#endif
/**************************************************************/
-#ifndef CONFIG_PPC_CPM_NEW_BINDING
-/* Track which ports are configured as uarts */
-int cpm_uart_port_map[UART_NR];
-/* How many ports did we config as uarts */
-int cpm_uart_nr;
-
-/* Place-holder for board-specific stuff */
-struct platform_device* __attribute__ ((weak)) __init
-early_uart_get_pdev(int index)
-{
- return NULL;
-}
-
-
-static void cpm_uart_count(void)
-{
- cpm_uart_nr = 0;
-#ifdef CONFIG_SERIAL_CPM_SMC1
- cpm_uart_port_map[cpm_uart_nr++] = UART_SMC1;
-#endif
-#ifdef CONFIG_SERIAL_CPM_SMC2
- cpm_uart_port_map[cpm_uart_nr++] = UART_SMC2;
-#endif
-#ifdef CONFIG_SERIAL_CPM_SCC1
- cpm_uart_port_map[cpm_uart_nr++] = UART_SCC1;
-#endif
-#ifdef CONFIG_SERIAL_CPM_SCC2
- cpm_uart_port_map[cpm_uart_nr++] = UART_SCC2;
-#endif
-#ifdef CONFIG_SERIAL_CPM_SCC3
- cpm_uart_port_map[cpm_uart_nr++] = UART_SCC3;
-#endif
-#ifdef CONFIG_SERIAL_CPM_SCC4
- cpm_uart_port_map[cpm_uart_nr++] = UART_SCC4;
-#endif
-}
-
-/* Get UART number by its id */
-static int cpm_uart_id2nr(int id)
-{
- int i;
- if (id < UART_NR) {
- for (i=0; i<UART_NR; i++) {
- if (cpm_uart_port_map[i] == id)
- return i;
- }
- }
-
- /* not found or invalid argument */
- return -1;
-}
-#endif
-
/*
* Check, if transmit buffers are processed
*/
cpm_uart_tx_pump(port);
}
+#ifdef CONFIG_CONSOLE_POLL
+static int serial_polled;
+#endif
+
/*
* Receive characters
*/
int i;
unsigned char ch;
u8 *cp;
- struct tty_struct *tty = port->info->tty;
+ struct tty_struct *tty = port->info->port.tty;
struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
cbd_t __iomem *bdp;
u16 status;
*/
bdp = pinfo->rx_cur;
for (;;) {
+#ifdef CONFIG_CONSOLE_POLL
+ if (unlikely(serial_polled)) {
+ serial_polled = 0;
+ return;
+ }
+#endif
/* get status */
status = in_be16(&bdp->cbd_sc);
/* If this one is empty, return happy */
goto handle_error;
if (uart_handle_sysrq_char(port, ch))
continue;
-
+#ifdef CONFIG_CONSOLE_POLL
+ if (unlikely(serial_polled)) {
+ serial_polled = 0;
+ return;
+ }
+#endif
error_return:
tty_insert_flip_char(tty, ch, flg);
}
}
+ /*
+ * Update the timeout
+ */
+ uart_update_timeout(port, termios->c_cflag, baud);
+
/*
* Set up parity check flag
*/
cpm_uart_request_port(port);
}
}
+
+#ifdef CONFIG_CONSOLE_POLL
+/* Serial polling routines for writing and reading from the uart while
+ * in an interrupt or debug context.
+ */
+
+#define GDB_BUF_SIZE 512 /* power of 2, please */
+
+static char poll_buf[GDB_BUF_SIZE];
+static char *pollp;
+static int poll_chars;
+
+static int poll_wait_key(char *obuf, struct uart_cpm_port *pinfo)
+{
+ u_char c, *cp;
+ volatile cbd_t *bdp;
+ int i;
+
+ /* Get the address of the host memory buffer.
+ */
+ bdp = pinfo->rx_cur;
+ while (bdp->cbd_sc & BD_SC_EMPTY)
+ ;
+
+ /* If the buffer address is in the CPM DPRAM, don't
+ * convert it.
+ */
+ cp = cpm2cpu_addr(bdp->cbd_bufaddr, pinfo);
+
+ if (obuf) {
+ i = c = bdp->cbd_datlen;
+ while (i-- > 0)
+ *obuf++ = *cp++;
+ } else
+ c = *cp;
+ bdp->cbd_sc &= ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV | BD_SC_ID);
+ bdp->cbd_sc |= BD_SC_EMPTY;
+
+ if (bdp->cbd_sc & BD_SC_WRAP)
+ bdp = pinfo->rx_bd_base;
+ else
+ bdp++;
+ pinfo->rx_cur = (cbd_t *)bdp;
+
+ return (int)c;
+}
+
+static int cpm_get_poll_char(struct uart_port *port)
+{
+ struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+
+ if (!serial_polled) {
+ serial_polled = 1;
+ poll_chars = 0;
+ }
+ if (poll_chars <= 0) {
+ poll_chars = poll_wait_key(poll_buf, pinfo);
+ pollp = poll_buf;
+ }
+ poll_chars--;
+ return *pollp++;
+}
+
+static void cpm_put_poll_char(struct uart_port *port,
+ unsigned char c)
+{
+ struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
+ static char ch[2];
+
+ ch[0] = (char)c;
+ cpm_uart_early_write(pinfo->port.line, ch, 1);
+}
+#endif /* CONFIG_CONSOLE_POLL */
+
static struct uart_ops cpm_uart_pops = {
.tx_empty = cpm_uart_tx_empty,
.set_mctrl = cpm_uart_set_mctrl,
.request_port = cpm_uart_request_port,
.config_port = cpm_uart_config_port,
.verify_port = cpm_uart_verify_port,
+#ifdef CONFIG_CONSOLE_POLL
+ .poll_get_char = cpm_get_poll_char,
+ .poll_put_char = cpm_put_poll_char,
+#endif
};
-#ifdef CONFIG_PPC_CPM_NEW_BINDING
struct uart_cpm_port cpm_uart_ports[UART_NR];
static int cpm_uart_init_port(struct device_node *np,
pinfo->port.type = PORT_CPM;
pinfo->port.ops = &cpm_uart_pops,
pinfo->port.iotype = UPIO_MEM;
+ pinfo->port.fifosize = pinfo->tx_nrfifos * pinfo->tx_fifosize;
spin_lock_init(&pinfo->port.lock);
pinfo->port.irq = of_irq_to_resource(np, 0, NULL);
return ret;
}
-#else
-
-struct uart_cpm_port cpm_uart_ports[UART_NR] = {
- [UART_SMC1] = {
- .port = {
- .irq = SMC1_IRQ,
- .ops = &cpm_uart_pops,
- .iotype = UPIO_MEM,
- .lock = __SPIN_LOCK_UNLOCKED(cpm_uart_ports[UART_SMC1].port.lock),
- },
- .flags = FLAG_SMC,
- .tx_nrfifos = TX_NUM_FIFO,
- .tx_fifosize = TX_BUF_SIZE,
- .rx_nrfifos = RX_NUM_FIFO,
- .rx_fifosize = RX_BUF_SIZE,
- .set_lineif = smc1_lineif,
- },
- [UART_SMC2] = {
- .port = {
- .irq = SMC2_IRQ,
- .ops = &cpm_uart_pops,
- .iotype = UPIO_MEM,
- .lock = __SPIN_LOCK_UNLOCKED(cpm_uart_ports[UART_SMC2].port.lock),
- },
- .flags = FLAG_SMC,
- .tx_nrfifos = TX_NUM_FIFO,
- .tx_fifosize = TX_BUF_SIZE,
- .rx_nrfifos = RX_NUM_FIFO,
- .rx_fifosize = RX_BUF_SIZE,
- .set_lineif = smc2_lineif,
-#ifdef CONFIG_SERIAL_CPM_ALT_SMC2
- .is_portb = 1,
-#endif
- },
- [UART_SCC1] = {
- .port = {
- .irq = SCC1_IRQ,
- .ops = &cpm_uart_pops,
- .iotype = UPIO_MEM,
- .lock = __SPIN_LOCK_UNLOCKED(cpm_uart_ports[UART_SCC1].port.lock),
- },
- .tx_nrfifos = TX_NUM_FIFO,
- .tx_fifosize = TX_BUF_SIZE,
- .rx_nrfifos = RX_NUM_FIFO,
- .rx_fifosize = RX_BUF_SIZE,
- .set_lineif = scc1_lineif,
- .wait_closing = SCC_WAIT_CLOSING,
- },
- [UART_SCC2] = {
- .port = {
- .irq = SCC2_IRQ,
- .ops = &cpm_uart_pops,
- .iotype = UPIO_MEM,
- .lock = __SPIN_LOCK_UNLOCKED(cpm_uart_ports[UART_SCC2].port.lock),
- },
- .tx_nrfifos = TX_NUM_FIFO,
- .tx_fifosize = TX_BUF_SIZE,
- .rx_nrfifos = RX_NUM_FIFO,
- .rx_fifosize = RX_BUF_SIZE,
- .set_lineif = scc2_lineif,
- .wait_closing = SCC_WAIT_CLOSING,
- },
- [UART_SCC3] = {
- .port = {
- .irq = SCC3_IRQ,
- .ops = &cpm_uart_pops,
- .iotype = UPIO_MEM,
- .lock = __SPIN_LOCK_UNLOCKED(cpm_uart_ports[UART_SCC3].port.lock),
- },
- .tx_nrfifos = TX_NUM_FIFO,
- .tx_fifosize = TX_BUF_SIZE,
- .rx_nrfifos = RX_NUM_FIFO,
- .rx_fifosize = RX_BUF_SIZE,
- .set_lineif = scc3_lineif,
- .wait_closing = SCC_WAIT_CLOSING,
- },
- [UART_SCC4] = {
- .port = {
- .irq = SCC4_IRQ,
- .ops = &cpm_uart_pops,
- .iotype = UPIO_MEM,
- .lock = __SPIN_LOCK_UNLOCKED(cpm_uart_ports[UART_SCC4].port.lock),
- },
- .tx_nrfifos = TX_NUM_FIFO,
- .tx_fifosize = TX_BUF_SIZE,
- .rx_nrfifos = RX_NUM_FIFO,
- .rx_fifosize = RX_BUF_SIZE,
- .set_lineif = scc4_lineif,
- .wait_closing = SCC_WAIT_CLOSING,
- },
-};
-
-int cpm_uart_drv_get_platform_data(struct platform_device *pdev, int is_con)
-{
- struct resource *r;
- struct fs_uart_platform_info *pdata = pdev->dev.platform_data;
- int idx; /* It is UART_SMCx or UART_SCCx index */
- struct uart_cpm_port *pinfo;
- int line;
- u32 mem, pram;
-
- idx = pdata->fs_no = fs_uart_get_id(pdata);
-
- line = cpm_uart_id2nr(idx);
- if(line < 0) {
- printk(KERN_ERR"%s(): port %d is not registered", __func__, idx);
- return -EINVAL;
- }
-
- pinfo = (struct uart_cpm_port *) &cpm_uart_ports[idx];
-
- pinfo->brg = pdata->brg;
-
- if (!is_con) {
- pinfo->port.line = line;
- pinfo->port.flags = UPF_BOOT_AUTOCONF;
- }
-
- if (!(r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs")))
- return -EINVAL;
- mem = (u32)ioremap(r->start, r->end - r->start + 1);
-
- if (!(r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pram")))
- return -EINVAL;
- pram = (u32)ioremap(r->start, r->end - r->start + 1);
-
- if(idx > fsid_smc2_uart) {
- pinfo->sccp = (scc_t *)mem;
- pinfo->sccup = (scc_uart_t *)pram;
- } else {
- pinfo->smcp = (smc_t *)mem;
- pinfo->smcup = (smc_uart_t *)pram;
- }
- pinfo->tx_nrfifos = pdata->tx_num_fifo;
- pinfo->tx_fifosize = pdata->tx_buf_size;
-
- pinfo->rx_nrfifos = pdata->rx_num_fifo;
- pinfo->rx_fifosize = pdata->rx_buf_size;
-
- pinfo->port.uartclk = pdata->uart_clk;
- pinfo->port.mapbase = (unsigned long)mem;
- pinfo->port.irq = platform_get_irq(pdev, 0);
-
- return 0;
-}
-#endif
-
#ifdef CONFIG_SERIAL_CPM_CONSOLE
/*
* Print a string to the serial port trying not to disturb
static void cpm_uart_console_write(struct console *co, const char *s,
u_int count)
{
-#ifdef CONFIG_PPC_CPM_NEW_BINDING
struct uart_cpm_port *pinfo = &cpm_uart_ports[co->index];
-#else
- struct uart_cpm_port *pinfo =
- &cpm_uart_ports[cpm_uart_port_map[co->index]];
-#endif
unsigned int i;
cbd_t __iomem *bdp, *bdbase;
unsigned char *cp;
+ unsigned long flags;
+ int nolock = oops_in_progress;
+
+ if (unlikely(nolock)) {
+ local_irq_save(flags);
+ } else {
+ spin_lock_irqsave(&pinfo->port.lock, flags);
+ }
/* Get the address of the host memory buffer.
*/
;
pinfo->tx_cur = bdp;
+
+ if (unlikely(nolock)) {
+ local_irq_restore(flags);
+ } else {
+ spin_unlock_irqrestore(&pinfo->port.lock, flags);
+ }
}
struct uart_cpm_port *pinfo;
struct uart_port *port;
-#ifdef CONFIG_PPC_CPM_NEW_BINDING
struct device_node *np = NULL;
int i = 0;
if (ret)
return ret;
-#else
-
- struct fs_uart_platform_info *pdata;
- struct platform_device* pdev = early_uart_get_pdev(co->index);
-
- if (!pdev) {
- pr_info("cpm_uart: console: compat mode\n");
- /* compatibility - will be cleaned up */
- cpm_uart_init_portdesc();
- }
-
- port =
- (struct uart_port *)&cpm_uart_ports[cpm_uart_port_map[co->index]];
- pinfo = (struct uart_cpm_port *)port;
- if (!pdev) {
- if (pinfo->set_lineif)
- pinfo->set_lineif(pinfo);
- } else {
- pdata = pdev->dev.platform_data;
- if (pdata)
- if (pdata->init_ioports)
- pdata->init_ioports(pdata);
-
- cpm_uart_drv_get_platform_data(pdev, 1);
- }
-
- pinfo->flags |= FLAG_CONSOLE;
-#endif
-
if (options) {
uart_parse_options(options, &baud, &parity, &bits, &flow);
} else {
.nr = UART_NR,
};
-#ifdef CONFIG_PPC_CPM_NEW_BINDING
static int probe_index;
static int __devinit cpm_uart_probe(struct of_device *ofdev,
of_unregister_platform_driver(&cpm_uart_driver);
uart_unregister_driver(&cpm_reg);
}
-#else
-static int cpm_uart_drv_probe(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct fs_uart_platform_info *pdata;
- int ret = -ENODEV;
-
- if(!pdev) {
- printk(KERN_ERR"CPM UART: platform data missing!\n");
- return ret;
- }
-
- pdata = pdev->dev.platform_data;
-
- if ((ret = cpm_uart_drv_get_platform_data(pdev, 0)))
- return ret;
-
- pr_debug("cpm_uart_drv_probe: Adding CPM UART %d\n", cpm_uart_id2nr(pdata->fs_no));
-
- if (pdata->init_ioports)
- pdata->init_ioports(pdata);
-
- ret = uart_add_one_port(&cpm_reg, &cpm_uart_ports[pdata->fs_no].port);
-
- return ret;
-}
-
-static int cpm_uart_drv_remove(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct fs_uart_platform_info *pdata = pdev->dev.platform_data;
-
- pr_debug("cpm_uart_drv_remove: Removing CPM UART %d\n",
- cpm_uart_id2nr(pdata->fs_no));
-
- uart_remove_one_port(&cpm_reg, &cpm_uart_ports[pdata->fs_no].port);
- return 0;
-}
-
-static struct device_driver cpm_smc_uart_driver = {
- .name = "fsl-cpm-smc:uart",
- .bus = &platform_bus_type,
- .probe = cpm_uart_drv_probe,
- .remove = cpm_uart_drv_remove,
-};
-
-static struct device_driver cpm_scc_uart_driver = {
- .name = "fsl-cpm-scc:uart",
- .bus = &platform_bus_type,
- .probe = cpm_uart_drv_probe,
- .remove = cpm_uart_drv_remove,
-};
-
-/*
- This is supposed to match uart devices on platform bus,
- */
-static int match_is_uart (struct device* dev, void* data)
-{
- struct platform_device* pdev = container_of(dev, struct platform_device, dev);
- int ret = 0;
- /* this was setfunc as uart */
- if(strstr(pdev->name,":uart")) {
- ret = 1;
- }
- return ret;
-}
-
-
-static int cpm_uart_init(void) {
-
- int ret;
- int i;
- struct device *dev;
- printk(KERN_INFO "Serial: CPM driver $Revision: 0.02 $\n");
-
- /* lookup the bus for uart devices */
- dev = bus_find_device(&platform_bus_type, NULL, 0, match_is_uart);
-
- /* There are devices on the bus - all should be OK */
- if (dev) {
- cpm_uart_count();
- cpm_reg.nr = cpm_uart_nr;
-
- if (!(ret = uart_register_driver(&cpm_reg))) {
- if ((ret = driver_register(&cpm_smc_uart_driver))) {
- uart_unregister_driver(&cpm_reg);
- return ret;
- }
- if ((ret = driver_register(&cpm_scc_uart_driver))) {
- driver_unregister(&cpm_scc_uart_driver);
- uart_unregister_driver(&cpm_reg);
- }
- }
- } else {
- /* No capable platform devices found - falling back to legacy mode */
- pr_info("cpm_uart: WARNING: no UART devices found on platform bus!\n");
- pr_info(
- "cpm_uart: the driver will guess configuration, but this mode is no longer supported.\n");
-
- /* Don't run this again, if the console driver did it already */
- if (cpm_uart_nr == 0)
- cpm_uart_init_portdesc();
-
- cpm_reg.nr = cpm_uart_nr;
- ret = uart_register_driver(&cpm_reg);
-
- if (ret)
- return ret;
-
- for (i = 0; i < cpm_uart_nr; i++) {
- int con = cpm_uart_port_map[i];
- cpm_uart_ports[con].port.line = i;
- cpm_uart_ports[con].port.flags = UPF_BOOT_AUTOCONF;
- if (cpm_uart_ports[con].set_lineif)
- cpm_uart_ports[con].set_lineif(&cpm_uart_ports[con]);
- uart_add_one_port(&cpm_reg, &cpm_uart_ports[con].port);
- }
-
- }
- return ret;
-}
-
-static void __exit cpm_uart_exit(void)
-{
- driver_unregister(&cpm_scc_uart_driver);
- driver_unregister(&cpm_smc_uart_driver);
- uart_unregister_driver(&cpm_reg);
-}
-#endif
module_init(cpm_uart_init);
module_exit(cpm_uart_exit);
git.samba.org / sfrench / cifs-2.6.git / blobdiff