[SERIAL] sunsab: Convert to of_driver framework.
David S. Miller [Thu, 29 Jun 2006 22:17:47 +0000 (15:17 -0700)]
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/serial/sunsab.c

index 7da02d1..8d3c7e2 100644 (file)
@@ -1,7 +1,7 @@
 /* sunsab.c: ASYNC Driver for the SIEMENS SAB82532 DUSCC.
  *
  * Copyright (C) 1997  Eddie C. Dost  (ecd@skynet.be)
- * Copyright (C) 2002  David S. Miller (davem@redhat.com)
+ * Copyright (C) 2002, 2006  David S. Miller (davem@davemloft.net)
  *
  * Rewrote buffer handling to use CIRC(Circular Buffer) macros.
  *   Maxim Krasnyanskiy <maxk@qualcomm.com>
@@ -12,7 +12,7 @@
  *   Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12
  *
  * Ported to new 2.5.x UART layer.
- *   David S. Miller <davem@redhat.com>
+ *   David S. Miller <davem@davemloft.net>
  */
 
 #include <linux/config.h>
@@ -37,8 +37,8 @@
 
 #include <asm/io.h>
 #include <asm/irq.h>
-#include <asm/oplib.h>
-#include <asm/ebus.h>
+#include <asm/prom.h>
+#include <asm/of_device.h>
 
 #if defined(CONFIG_SERIAL_SUNZILOG_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
 #define SUPPORT_SYSRQ
@@ -976,199 +976,188 @@ static inline struct console *SUNSAB_CONSOLE(void)
 #define sunsab_console_init()  do { } while (0)
 #endif
 
-static void __init for_each_sab_edev(void (*callback)(struct linux_ebus_device *, void *), void *arg)
+static int __init sunsab_init_one(struct uart_sunsab_port *up,
+                                 struct of_device *op,
+                                 unsigned long offset,
+                                 int line)
 {
-       struct linux_ebus *ebus;
-       struct linux_ebus_device *edev = NULL;
-
-       for_each_ebus(ebus) {
-               for_each_ebusdev(edev, ebus) {
-                       if (!strcmp(edev->prom_node->name, "se")) {
-                               callback(edev, arg);
-                               continue;
-                       } else if (!strcmp(edev->prom_node->name, "serial")) {
-                               char *compat;
-                               int clen;
-
-                               /* On RIO this can be an SE, check it.  We could
-                                * just check ebus->is_rio, but this is more portable.
-                                */
-                               compat = of_get_property(edev->prom_node,
-                                                        "compatible", &clen);
-                               if (compat && clen > 0) {
-                                       if (strncmp(compat, "sab82532", 8) == 0) {
-                                               callback(edev, arg);
-                                               continue;
-                                       }
-                               }
-                       }
-               }
-       }
-}
+       up->port.line = line;
+       up->port.dev = &op->dev;
+
+       up->port.mapbase = op->resource[0].start + offset;
+       up->port.membase = of_ioremap(&op->resource[0], offset,
+                                     sizeof(union sab82532_async_regs),
+                                     "sab");
+       if (!up->port.membase)
+               return -ENOMEM;
+       up->regs = (union sab82532_async_regs __iomem *) up->port.membase;
 
-static void __init sab_count_callback(struct linux_ebus_device *edev, void *arg)
-{
-       int *count_p = arg;
+       up->port.irq = op->irqs[0];
 
-       (*count_p)++;
-}
+       up->port.fifosize = SAB82532_XMIT_FIFO_SIZE;
+       up->port.iotype = UPIO_MEM;
 
-static void __init sab_attach_callback(struct linux_ebus_device *edev, void *arg)
-{
-       int *instance_p = arg;
-       struct uart_sunsab_port *up;
-       unsigned long regs, offset;
-       int i;
+       writeb(SAB82532_IPC_IC_ACT_LOW, &up->regs->w.ipc);
 
-       /* Note: ports are located in reverse order */
-       regs = edev->resource[0].start;
-       offset = sizeof(union sab82532_async_regs);
-       for (i = 0; i < 2; i++) {
-               up = &sunsab_ports[(*instance_p * 2) + 1 - i];
+       up->port.ops = &sunsab_pops;
+       up->port.type = PORT_SUNSAB;
+       up->port.uartclk = SAB_BASE_BAUD;
 
-               memset(up, 0, sizeof(*up));
-               up->regs = ioremap(regs + offset, sizeof(union sab82532_async_regs));
-               up->port.irq = edev->irqs[0];
-               up->port.fifosize = SAB82532_XMIT_FIFO_SIZE;
-               up->port.mapbase = (unsigned long)up->regs;
-               up->port.iotype = UPIO_MEM;
+       up->type = readb(&up->regs->r.vstr) & 0x0f;
+       writeb(~((1 << 1) | (1 << 2) | (1 << 4)), &up->regs->w.pcr);
+       writeb(0xff, &up->regs->w.pim);
+       if ((up->port.line & 0x1) == 0) {
+               up->pvr_dsr_bit = (1 << 0);
+               up->pvr_dtr_bit = (1 << 1);
+       } else {
+               up->pvr_dsr_bit = (1 << 3);
+               up->pvr_dtr_bit = (1 << 2);
+       }
+       up->cached_pvr = (1 << 1) | (1 << 2) | (1 << 4);
+       writeb(up->cached_pvr, &up->regs->w.pvr);
+       up->cached_mode = readb(&up->regs->rw.mode);
+       up->cached_mode |= SAB82532_MODE_FRTS;
+       writeb(up->cached_mode, &up->regs->rw.mode);
+       up->cached_mode |= SAB82532_MODE_RTS;
+       writeb(up->cached_mode, &up->regs->rw.mode);
 
-               writeb(SAB82532_IPC_IC_ACT_LOW, &up->regs->w.ipc);
+       up->tec_timeout = SAB82532_MAX_TEC_TIMEOUT;
+       up->cec_timeout = SAB82532_MAX_CEC_TIMEOUT;
 
-               offset -= sizeof(union sab82532_async_regs);
+       if (!(up->port.line & 0x01)) {
+               int err;
+
+               err = request_irq(up->port.irq, sunsab_interrupt,
+                                 SA_SHIRQ, "sab", up);
+               if (err) {
+                       of_iounmap(up->port.membase,
+                                  sizeof(union sab82532_async_regs));
+                       return err;
+               }
        }
-       
-       (*instance_p)++;
+
+       return 0;
 }
 
-static int __init probe_for_sabs(void)
+static int __devinit sab_probe(struct of_device *op, const struct of_device_id *match)
 {
-       int this_sab = 0;
+       static int inst;
+       struct uart_sunsab_port *up;
+       int err;
+
+       up = &sunsab_ports[inst * 2];
+
+       err = sunsab_init_one(&up[0], op,
+                             sizeof(union sab82532_async_regs),
+                             (inst * 2) + 0);
+       if (err)
+               return err;
+
+       err = sunsab_init_one(&up[0], op, 0,
+                             (inst * 2) + 1);
+       if (err) {
+               of_iounmap(up[0].port.membase,
+                          sizeof(union sab82532_async_regs));
+               free_irq(up[0].port.irq, &up[0]);
+               return err;
+       }
 
-       /* Find device instances.  */
-       for_each_sab_edev(&sab_count_callback, &this_sab);
-       if (!this_sab)
-               return -ENODEV;
+       uart_add_one_port(&sunsab_reg, &up[0].port);
+       uart_add_one_port(&sunsab_reg, &up[1].port);
 
-       /* Allocate tables.  */
-       sunsab_ports = kmalloc(sizeof(struct uart_sunsab_port) * this_sab * 2,
-                              GFP_KERNEL);
-       if (!sunsab_ports)
-               return -ENOMEM;
+       dev_set_drvdata(&op->dev, &up[0]);
 
-       num_channels = this_sab * 2;
+       inst++;
 
-       this_sab = 0;
-       for_each_sab_edev(&sab_attach_callback, &this_sab);
        return 0;
 }
 
-static void __init sunsab_init_hw(void)
+static void __devexit sab_remove_one(struct uart_sunsab_port *up)
 {
-       int i;
-
-       for (i = 0; i < num_channels; i++) {
-               struct uart_sunsab_port *up = &sunsab_ports[i];
-
-               up->port.line = i;
-               up->port.ops = &sunsab_pops;
-               up->port.type = PORT_SUNSAB;
-               up->port.uartclk = SAB_BASE_BAUD;
-
-               up->type = readb(&up->regs->r.vstr) & 0x0f;
-               writeb(~((1 << 1) | (1 << 2) | (1 << 4)), &up->regs->w.pcr);
-               writeb(0xff, &up->regs->w.pim);
-               if (up->port.line == 0) {
-                       up->pvr_dsr_bit = (1 << 0);
-                       up->pvr_dtr_bit = (1 << 1);
-               } else {
-                       up->pvr_dsr_bit = (1 << 3);
-                       up->pvr_dtr_bit = (1 << 2);
-               }
-               up->cached_pvr = (1 << 1) | (1 << 2) | (1 << 4);
-               writeb(up->cached_pvr, &up->regs->w.pvr);
-               up->cached_mode = readb(&up->regs->rw.mode);
-               up->cached_mode |= SAB82532_MODE_FRTS;
-               writeb(up->cached_mode, &up->regs->rw.mode);
-               up->cached_mode |= SAB82532_MODE_RTS;
-               writeb(up->cached_mode, &up->regs->rw.mode);
-
-               up->tec_timeout = SAB82532_MAX_TEC_TIMEOUT;
-               up->cec_timeout = SAB82532_MAX_CEC_TIMEOUT;
-
-               if (!(up->port.line & 0x01)) {
-                       if (request_irq(up->port.irq, sunsab_interrupt,
-                                       SA_SHIRQ, "serial(sab82532)", up)) {
-                               printk("sunsab%d: can't get IRQ %x\n",
-                                      i, up->port.irq);
-                               continue;
-                       }
-               }
-       }
+       uart_remove_one_port(&sunsab_reg, &up->port);
+       if (!(up->port.line & 1))
+               free_irq(up->port.irq, up);
+       of_iounmap(up->port.membase,
+                  sizeof(union sab82532_async_regs));
 }
 
-static int __init sunsab_init(void)
+static int __devexit sab_remove(struct of_device *op)
 {
-       int ret = probe_for_sabs();
-       int i;
-
-       if (ret < 0)
-               return ret;
+       struct uart_sunsab_port *up = dev_get_drvdata(&op->dev);
 
-       sunsab_init_hw();
+       sab_remove_one(&up[0]);
+       sab_remove_one(&up[1]);
 
-       sunsab_reg.minor = sunserial_current_minor;
-       sunsab_reg.nr = num_channels;
+       dev_set_drvdata(&op->dev, NULL);
 
-       ret = uart_register_driver(&sunsab_reg);
-       if (ret < 0) {
-               int i;
+       return 0;
+}
 
-               for (i = 0; i < num_channels; i++) {
-                       struct uart_sunsab_port *up = &sunsab_ports[i];
+static struct of_device_id sab_match[] = {
+       {
+               .name = "se",
+       },
+       {
+               .name = "serial",
+               .compatible = "sab82532",
+       },
+       {},
+};
+MODULE_DEVICE_TABLE(of, sab_match);
 
-                       if (!(up->port.line & 0x01))
-                               free_irq(up->port.irq, up);
-                       iounmap(up->regs);
-               }
-               kfree(sunsab_ports);
-               sunsab_ports = NULL;
+static struct of_platform_driver sab_driver = {
+       .name           = "sab",
+       .match_table    = sab_match,
+       .probe          = sab_probe,
+       .remove         = __devexit_p(sab_remove),
+};
 
-               return ret;
+static int __init sunsab_init(void)
+{
+       struct device_node *dp;
+       int err;
+
+       num_channels = 0;
+       for_each_node_by_name(dp, "su")
+               num_channels += 2;
+       for_each_node_by_name(dp, "serial") {
+               if (of_device_is_compatible(dp, "sab82532"))
+                       num_channels += 2;
        }
 
-       sunsab_reg.tty_driver->name_base = sunsab_reg.minor - 64;
+       if (num_channels) {
+               sunsab_ports = kzalloc(sizeof(struct uart_sunsab_port) *
+                                      num_channels, GFP_KERNEL);
+               if (!sunsab_ports)
+                       return -ENOMEM;
 
-       sunsab_reg.cons = SUNSAB_CONSOLE();
+               sunsab_reg.minor = sunserial_current_minor;
+               sunsab_reg.nr = num_channels;
 
-       sunserial_current_minor += num_channels;
-       
-       for (i = 0; i < num_channels; i++) {
-               struct uart_sunsab_port *up = &sunsab_ports[i];
+               err = uart_register_driver(&sunsab_reg);
+               if (err) {
+                       kfree(sunsab_ports);
+                       sunsab_ports = NULL;
 
-               uart_add_one_port(&sunsab_reg, &up->port);
+                       return err;
+               }
+
+               sunsab_reg.tty_driver->name_base = sunsab_reg.minor - 64;
+               sunsab_reg.cons = SUNSAB_CONSOLE();
+               sunserial_current_minor += num_channels;
        }
 
-       return 0;
+       return of_register_driver(&sab_driver, &of_bus_type);
 }
 
 static void __exit sunsab_exit(void)
 {
-       int i;
-
-       for (i = 0; i < num_channels; i++) {
-               struct uart_sunsab_port *up = &sunsab_ports[i];
-
-               uart_remove_one_port(&sunsab_reg, &up->port);
-
-               if (!(up->port.line & 0x01))
-                       free_irq(up->port.irq, up);
-               iounmap(up->regs);
+       of_unregister_driver(&sab_driver);
+       if (num_channels) {
+               sunserial_current_minor -= num_channels;
+               uart_unregister_driver(&sunsab_reg);
        }
 
-       sunserial_current_minor -= num_channels;
-       uart_unregister_driver(&sunsab_reg);
-
        kfree(sunsab_ports);
        sunsab_ports = NULL;
 }