[SERIAL] sunzilog: Convert to of_driver.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 258 insertions, 527 deletions

diff --git a/drivers/serial/sunzilog.c b/drivers/serial/sunzilog.c
index 9f42677287ad..cbdf9d605b3f 100644
--- a/drivers/serial/sunzilog.c
+++ b/drivers/serial/sunzilog.c
@@ -1,5 +1,4 @@
-/*
- * sunzilog.c
+/* sunzilog.c: Zilog serial driver for Sparc systems.
  *
  * Driver for Zilog serial chips found on Sun workstations and
  * servers.  This driver could actually be made more generic.
@@ -10,7 +9,7 @@
  * C. Dost, Pete Zaitcev, Ted Ts'o and Alex Buell for their
  * work there.
  *
- *  Copyright (C) 2002 David S. Miller (davem@redhat.com)
+ *  Copyright (C) 2002, 2006 David S. Miller (davem@davemloft.net)
  */
 
 #include <linux/config.h>
@@ -38,10 +37,8 @@
 
 #include <asm/io.h>
 #include <asm/irq.h>
-#ifdef CONFIG_SPARC64
-#include <asm/fhc.h>
-#endif
-#include <asm/sbus.h>
+#include <asm/prom.h>
+#include <asm/of_device.h>
 
 #if defined(CONFIG_SERIAL_SUNZILOG_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
 #define SUPPORT_SYSRQ
@@ -65,7 +62,7 @@
 #define ZSDELAY()
 #define ZSDELAY_LONG()
 #define ZS_WSYNC(__channel) \
-        sbus_readb(&((__channel)->control))
+        readb(&((__channel)->control))
 #endif
 
 static int num_sunzilog;
@@ -107,7 +104,7 @@ struct uart_sunzilog_port {
         unsigned char                   prev_status;
 
 #ifdef CONFIG_SERIO
-        struct serio                    *serio;
+        struct serio                    serio;
         int                             serio_open;
 #endif
 };
@@ -138,9 +135,9 @@ static unsigned char read_zsreg(struct zilog_channel __iomem *channel,
 {
         unsigned char retval;
 
-        sbus_writeb(reg, &channel->control);
+        writeb(reg, &channel->control);
         ZSDELAY();
-        retval = sbus_readb(&channel->control);
+        retval = readb(&channel->control);
         ZSDELAY();
 
         return retval;
@@ -149,9 +146,9 @@ static unsigned char read_zsreg(struct zilog_channel __iomem *channel,
 static void write_zsreg(struct zilog_channel __iomem *channel,
                         unsigned char reg, unsigned char value)
 {
-        sbus_writeb(reg, &channel->control);
+        writeb(reg, &channel->control);
         ZSDELAY();
-        sbus_writeb(value, &channel->control);
+        writeb(value, &channel->control);
         ZSDELAY();
 }
 
@@ -162,17 +159,17 @@ static void sunzilog_clear_fifo(struct zilog_channel __iomem *channel)
         for (i = 0; i < 32; i++) {
                 unsigned char regval;
 
-                regval = sbus_readb(&channel->control);
+                regval = readb(&channel->control);
                 ZSDELAY();
                 if (regval & Rx_CH_AV)
                         break;
 
                 regval = read_zsreg(channel, R1);
-                sbus_readb(&channel->data);
+                readb(&channel->data);
                 ZSDELAY();
 
                 if (regval & (PAR_ERR | Rx_OVR | CRC_ERR)) {
-                        sbus_writeb(ERR_RES, &channel->control);
+                        writeb(ERR_RES, &channel->control);
                         ZSDELAY();
                         ZS_WSYNC(channel);
                 }
@@ -194,7 +191,7 @@ static void __load_zsregs(struct zilog_channel __iomem *channel, unsigned char *
                 udelay(100);
         }
 
-        sbus_writeb(ERR_RES, &channel->control);
+        writeb(ERR_RES, &channel->control);
         ZSDELAY();
         ZS_WSYNC(channel);
 
@@ -291,7 +288,7 @@ static void sunzilog_kbdms_receive_chars(struct uart_sunzilog_port *up,
                 /* Stop-A is handled by drivers/char/keyboard.c now. */
 #ifdef CONFIG_SERIO
                 if (up->serio_open)
-                        serio_interrupt(up->serio, ch, 0, regs);
+                        serio_interrupt(&up->serio, ch, 0, regs);
 #endif
         } else if (ZS_IS_MOUSE(up)) {
                 int ret = suncore_mouse_baud_detection(ch, is_break);
@@ -306,7 +303,7 @@ static void sunzilog_kbdms_receive_chars(struct uart_sunzilog_port *up,
                 case 0:
 #ifdef CONFIG_SERIO
                         if (up->serio_open)
-                                serio_interrupt(up->serio, ch, 0, regs);
+                                serio_interrupt(&up->serio, ch, 0, regs);
 #endif
                         break;
                 };
@@ -330,12 +327,12 @@ sunzilog_receive_chars(struct uart_sunzilog_port *up,
 
                 r1 = read_zsreg(channel, R1);
                 if (r1 & (PAR_ERR | Rx_OVR | CRC_ERR)) {
-                        sbus_writeb(ERR_RES, &channel->control);
+                        writeb(ERR_RES, &channel->control);
                         ZSDELAY();
                         ZS_WSYNC(channel);
                 }
 
-                ch = sbus_readb(&channel->control);
+                ch = readb(&channel->control);
                 ZSDELAY();
 
                 /* This funny hack depends upon BRK_ABRT not interfering
@@ -347,7 +344,7 @@ sunzilog_receive_chars(struct uart_sunzilog_port *up,
                 if (!(ch & Rx_CH_AV))
                         break;
 
-                ch = sbus_readb(&channel->data);
+                ch = readb(&channel->data);
                 ZSDELAY();
 
                 ch &= up->parity_mask;
@@ -406,10 +403,10 @@ static void sunzilog_status_handle(struct uart_sunzilog_port *up,
 {
         unsigned char status;
 
-        status = sbus_readb(&channel->control);
+        status = readb(&channel->control);
         ZSDELAY();
 
-        sbus_writeb(RES_EXT_INT, &channel->control);
+        writeb(RES_EXT_INT, &channel->control);
         ZSDELAY();
         ZS_WSYNC(channel);
 
@@ -421,7 +418,7 @@ static void sunzilog_status_handle(struct uart_sunzilog_port *up,
                          * confusing the PROM.
                          */
                         while (1) {
-                                status = sbus_readb(&channel->control);
+                                status = readb(&channel->control);
                                 ZSDELAY();
                                 if (!(status & BRK_ABRT))
                                         break;
@@ -458,7 +455,7 @@ static void sunzilog_transmit_chars(struct uart_sunzilog_port *up,
         struct circ_buf *xmit;
 
         if (ZS_IS_CONS(up)) {
-                unsigned char status = sbus_readb(&channel->control);
+                unsigned char status = readb(&channel->control);
                 ZSDELAY();
 
                 /* TX still busy?  Just wait for the next TX done interrupt.
@@ -487,7 +484,7 @@ static void sunzilog_transmit_chars(struct uart_sunzilog_port *up,
 
         if (up->port.x_char) {
                 up->flags |= SUNZILOG_FLAG_TX_ACTIVE;
-                sbus_writeb(up->port.x_char, &channel->data);
+                writeb(up->port.x_char, &channel->data);
                 ZSDELAY();
                 ZS_WSYNC(channel);
 
@@ -506,7 +503,7 @@ static void sunzilog_transmit_chars(struct uart_sunzilog_port *up,
                 goto ack_tx_int;
 
         up->flags |= SUNZILOG_FLAG_TX_ACTIVE;
-        sbus_writeb(xmit->buf[xmit->tail], &channel->data);
+        writeb(xmit->buf[xmit->tail], &channel->data);
         ZSDELAY();
         ZS_WSYNC(channel);
 
@@ -519,7 +516,7 @@ static void sunzilog_transmit_chars(struct uart_sunzilog_port *up,
         return;
 
 ack_tx_int:
-        sbus_writeb(RES_Tx_P, &channel->control);
+        writeb(RES_Tx_P, &channel->control);
         ZSDELAY();
         ZS_WSYNC(channel);
 }
@@ -540,7 +537,7 @@ static irqreturn_t sunzilog_interrupt(int irq, void *dev_id, struct pt_regs *reg
                 /* Channel A */
                 tty = NULL;
                 if (r3 & (CHAEXT | CHATxIP | CHARxIP)) {
-                        sbus_writeb(RES_H_IUS, &channel->control);
+                        writeb(RES_H_IUS, &channel->control);
                         ZSDELAY();
                         ZS_WSYNC(channel);
 
@@ -563,7 +560,7 @@ static irqreturn_t sunzilog_interrupt(int irq, void *dev_id, struct pt_regs *reg
                 spin_lock(&up->port.lock);
                 tty = NULL;
                 if (r3 & (CHBEXT | CHBTxIP | CHBRxIP)) {
-                        sbus_writeb(RES_H_IUS, &channel->control);
+                        writeb(RES_H_IUS, &channel->control);
                         ZSDELAY();
                         ZS_WSYNC(channel);
 
@@ -594,7 +591,7 @@ static __inline__ unsigned char sunzilog_read_channel_status(struct uart_port *p
         unsigned char status;
 
         channel = ZILOG_CHANNEL_FROM_PORT(port);
-        status = sbus_readb(&channel->control);
+        status = readb(&channel->control);
         ZSDELAY();
 
         return status;
@@ -682,7 +679,7 @@ static void sunzilog_start_tx(struct uart_port *port)
         up->flags |= SUNZILOG_FLAG_TX_ACTIVE;
         up->flags &= ~SUNZILOG_FLAG_TX_STOPPED;
 
-        status = sbus_readb(&channel->control);
+        status = readb(&channel->control);
         ZSDELAY();
 
         /* TX busy?  Just wait for the TX done interrupt.  */
@@ -693,7 +690,7 @@ static void sunzilog_start_tx(struct uart_port *port)
          * IRQ sending engine.
          */
         if (port->x_char) {
-                sbus_writeb(port->x_char, &channel->data);
+                writeb(port->x_char, &channel->data);
                 ZSDELAY();
                 ZS_WSYNC(channel);
 
@@ -702,7 +699,7 @@ static void sunzilog_start_tx(struct uart_port *port)
         } else {
                 struct circ_buf *xmit = &port->info->xmit;
 
-                sbus_writeb(xmit->buf[xmit->tail], &channel->data);
+                writeb(xmit->buf[xmit->tail], &channel->data);
                 ZSDELAY();
                 ZS_WSYNC(channel);
 
@@ -779,7 +776,7 @@ static void __sunzilog_startup(struct uart_sunzilog_port *up)
         struct zilog_channel __iomem *channel;
 
         channel = ZILOG_CHANNEL_FROM_PORT(&up->port);
-        up->prev_status = sbus_readb(&channel->control);
+        up->prev_status = readb(&channel->control);
 
         /* Enable receiver and transmitter.  */
         up->curregs[R3] |= RxENAB;
@@ -963,7 +960,7 @@ sunzilog_set_termios(struct uart_port *port, struct termios *termios,
 
 static const char *sunzilog_type(struct uart_port *port)
 {
-        return "SunZilog";
+        return "zs";
 }
 
 /* We do not request/release mappings of the registers here, this
@@ -1012,7 +1009,6 @@ static struct uart_sunzilog_port *sunzilog_port_table;
 static struct zilog_layout __iomem **sunzilog_chip_regs;
 
 static struct uart_sunzilog_port *sunzilog_irq_chain;
-static int zilog_irq = -1;
 
 static struct uart_driver sunzilog_reg = {
         .owner          =       THIS_MODULE,
@@ -1021,232 +1017,47 @@ static struct uart_driver sunzilog_reg = {
         .major          =       TTY_MAJOR,
 };
 
-static void * __init alloc_one_table(unsigned long size)
+static int __init sunzilog_alloc_tables(void)
 {
-        void *ret;
-
-        ret = kmalloc(size, GFP_KERNEL);
-        if (ret != NULL)
-                memset(ret, 0, size);
+        struct uart_sunzilog_port *up;
+        unsigned long size;
+        int i;
 
-        return ret;
-}
+        size = NUM_CHANNELS * sizeof(struct uart_sunzilog_port);
+        sunzilog_port_table = kzalloc(size, GFP_KERNEL);
+        if (!sunzilog_port_table)
+                return -ENOMEM;
 
-static void __init sunzilog_alloc_tables(void)
-{
-        sunzilog_port_table = 
-                alloc_one_table(NUM_CHANNELS * sizeof(struct uart_sunzilog_port));
-        sunzilog_chip_regs = 
-                alloc_one_table(NUM_SUNZILOG * sizeof(struct zilog_layout __iomem *));
-
-        if (sunzilog_port_table == NULL || sunzilog_chip_regs == NULL) {
-                prom_printf("SunZilog: Cannot allocate tables.\n");
-                prom_halt();
-        }
-}
+        for (i = 0; i < NUM_CHANNELS; i++) {
+                up = &sunzilog_port_table[i];
 
-#ifdef CONFIG_SPARC64
+                spin_lock_init(&up->port.lock);
 
-/* We used to attempt to use the address property of the Zilog device node
- * but that totally is not necessary on sparc64.
- */
-static struct zilog_layout __iomem * __init get_zs_sun4u(int chip, int zsnode)
-{
-        void __iomem *mapped_addr;
-        unsigned int sun4u_ino;
-        struct sbus_bus *sbus = NULL;
-        struct sbus_dev *sdev = NULL;
-        int err;
+                if (i == 0)
+                        sunzilog_irq_chain = up;
 
-        if (central_bus == NULL) {
-                for_each_sbus(sbus) {
-                        for_each_sbusdev(sdev, sbus) {
-                                if (sdev->prom_node == zsnode)
-                                        goto found;
-                        }
-                }
-        }
- found:
-        if (sdev == NULL && central_bus == NULL) {
-                prom_printf("SunZilog: sdev&&central == NULL for "
-                            "Zilog %d in get_zs_sun4u.\n", chip);
-                prom_halt();
-        }
-        if (central_bus == NULL) {
-                mapped_addr =
-                        sbus_ioremap(&sdev->resource[0], 0,
-                                     PAGE_SIZE,
-                                     "Zilog Registers");
-        } else {
-                struct linux_prom_registers zsregs[1];
-
-                err = prom_getproperty(zsnode, "reg",
-                                       (char *) &zsregs[0],
-                                       sizeof(zsregs));
-                if (err == -1) {
-                        prom_printf("SunZilog: Cannot map "
-                                    "Zilog %d regs on "
-                                    "central bus.\n", chip);
-                        prom_halt();
-                }
-                apply_fhc_ranges(central_bus->child,
-                                 &zsregs[0], 1);
-                apply_central_ranges(central_bus, &zsregs[0], 1);
-                mapped_addr = (void __iomem *)
-                        ((((u64)zsregs[0].which_io)<<32UL) |
-                        ((u64)zsregs[0].phys_addr));
+                if (i < NUM_CHANNELS - 1)
+                        up->next = up + 1;
+                else
+                        up->next = NULL;
         }
 
-        if (zilog_irq == -1) {
-                if (central_bus) {
-                        unsigned long iclr, imap;
-
-                        iclr = central_bus->child->fhc_regs.uregs
-                                + FHC_UREGS_ICLR;
-                        imap = central_bus->child->fhc_regs.uregs
-                                + FHC_UREGS_IMAP;
-                        zilog_irq = build_irq(0, iclr, imap);
-                } else {
-                        err = prom_getproperty(zsnode, "interrupts",
-                                               (char *) &sun4u_ino,
-                                               sizeof(sun4u_ino));
-                        zilog_irq = sbus_build_irq(sbus_root, sun4u_ino);
-                }
+        size = NUM_SUNZILOG * sizeof(struct zilog_layout __iomem *);
+        sunzilog_chip_regs = kzalloc(size, GFP_KERNEL);
+        if (!sunzilog_chip_regs) {
+                kfree(sunzilog_port_table);
+                sunzilog_irq_chain = NULL;
+                return -ENOMEM;
         }
 
-        return (struct zilog_layout __iomem *) mapped_addr;
+        return 0;
 }
-#else /* CONFIG_SPARC64 */
 
-/*
- * XXX The sun4d case is utterly screwed: it tries to re-walk the tree
- * (for the 3rd time) in order to find bootbus and cpu. Streamline it.
- */
-static struct zilog_layout __iomem * __init get_zs_sun4cmd(int chip, int node)
+static void sunzilog_free_tables(void)
 {
-        struct linux_prom_irqs irq_info[2];
-        void __iomem *mapped_addr = NULL;
-        int zsnode, cpunode, bbnode;
-        struct linux_prom_registers zsreg[4];
-        struct resource res;
-
-        if (sparc_cpu_model == sun4d) {
-                int walk;
-
-                zsnode = 0;
-                bbnode = 0;
-                cpunode = 0;
-                for (walk = prom_getchild(prom_root_node);
-                     (walk = prom_searchsiblings(walk, "cpu-unit")) != 0;
-                     walk = prom_getsibling(walk)) {
-                        bbnode = prom_getchild(walk);
-                        if (bbnode &&
-                            (bbnode = prom_searchsiblings(bbnode, "bootbus"))) {
-                                if ((zsnode = prom_getchild(bbnode)) == node) {
-                                        cpunode = walk;
-                                        break;
-                                }
-                        }
-                }
-                if (!walk) {
-                        prom_printf("SunZilog: Cannot find the %d'th bootbus on sun4d.\n",
-                                    (chip / 2));
-                        prom_halt();
-                }
-
-                if (prom_getproperty(zsnode, "reg",
-                                     (char *) zsreg, sizeof(zsreg)) == -1) {
-                        prom_printf("SunZilog: Cannot map Zilog %d\n", chip);
-                        prom_halt();
-                }
-                /* XXX Looks like an off by one? */
-                prom_apply_generic_ranges(bbnode, cpunode, zsreg, 1);
-                res.start = zsreg[0].phys_addr;
-                res.end = res.start + (8 - 1);
-                res.flags = zsreg[0].which_io | IORESOURCE_IO;
-                mapped_addr = sbus_ioremap(&res, 0, 8, "Zilog Serial");
-
-        } else {
-                zsnode = node;
-
-#if 0 /* XXX When was this used? */
-                if (prom_getintdefault(zsnode, "slave", -1) != chipid) {
-                        zsnode = prom_getsibling(zsnode);
-                        continue;
-                }
-#endif
-
-                /*
-                 * "address" is only present on ports that OBP opened
-                 * (from Mitch Bradley's "Hitchhiker's Guide to OBP").
-                 * We do not use it.
-                 */
-
-                if (prom_getproperty(zsnode, "reg",
-                                     (char *) zsreg, sizeof(zsreg)) == -1) {
-                        prom_printf("SunZilog: Cannot map Zilog %d\n", chip);
-                        prom_halt();
-                }
-                if (sparc_cpu_model == sun4m)   /* Crude. Pass parent. XXX */
-                        prom_apply_obio_ranges(zsreg, 1);
-                res.start = zsreg[0].phys_addr;
-                res.end = res.start + (8 - 1);
-                res.flags = zsreg[0].which_io | IORESOURCE_IO;
-                mapped_addr = sbus_ioremap(&res, 0, 8, "Zilog Serial");
-        }
-
-        if (prom_getproperty(zsnode, "intr",
-                             (char *) irq_info, sizeof(irq_info))
-                    % sizeof(struct linux_prom_irqs)) {
-                prom_printf("SunZilog: Cannot get IRQ property for Zilog %d.\n",
-                            chip);
-                prom_halt();
-        }
-        if (zilog_irq == -1) {
-                zilog_irq = irq_info[0].pri;
-        } else if (zilog_irq != irq_info[0].pri) {
-                /* XXX. Dumb. Should handle per-chip IRQ, for add-ons. */
-                prom_printf("SunZilog: Inconsistent IRQ layout for Zilog %d.\n",
-                            chip);
-                prom_halt();
-        }
-
-        return (struct zilog_layout __iomem *) mapped_addr;
-}
-#endif /* !(CONFIG_SPARC64) */
-
-/* Get the address of the registers for SunZilog instance CHIP.  */
-static struct zilog_layout __iomem * __init get_zs(int chip, int node)
-{
-        if (chip < 0 || chip >= NUM_SUNZILOG) {
-                prom_printf("SunZilog: Illegal chip number %d in get_zs.\n", chip);
-                prom_halt();
-        }
-
-#ifdef CONFIG_SPARC64
-        return get_zs_sun4u(chip, node);
-#else
-
-        if (sparc_cpu_model == sun4) {
-                struct resource res;
-
-                /* Not probe-able, hard code it. */
-                switch (chip) {
-                case 0:
-                        res.start = 0xf1000000;
-                        break;
-                case 1:
-                        res.start = 0xf0000000;
-                        break;
-                };
-                zilog_irq = 12;
-                res.end = (res.start + (8 - 1));
-                res.flags = IORESOURCE_IO;
-                return sbus_ioremap(&res, 0, 8, "SunZilog");
-        }
-
-        return get_zs_sun4cmd(chip, node);
-#endif
+        kfree(sunzilog_port_table);
+        sunzilog_irq_chain = NULL;
+        kfree(sunzilog_chip_regs);
 }
 
 #define ZS_PUT_CHAR_MAX_DELAY   2000    /* 10 ms */
@@ -1260,7 +1071,7 @@ static void sunzilog_putchar(struct uart_port *port, int ch)
          * udelay with ZSDELAY as that is a NOP on some platforms.  -DaveM
          */
         do {
-                unsigned char val = sbus_readb(&channel->control);
+                unsigned char val = readb(&channel->control);
                 if (val & Tx_BUF_EMP) {
                         ZSDELAY();
                         break;
@@ -1268,7 +1079,7 @@ static void sunzilog_putchar(struct uart_port *port, int ch)
                 udelay(5);
         } while (--loops);
 
-        sbus_writeb(ch, &channel->data);
+        writeb(ch, &channel->data);
         ZSDELAY();
         ZS_WSYNC(channel);
 }
@@ -1385,28 +1196,6 @@ static struct console sunzilog_console = {
         .data   =       &sunzilog_reg,
 };
 
-static int __init sunzilog_console_init(void)
-{
-        int i;
-
-        if (con_is_present())
-                return 0;
-
-        for (i = 0; i < NUM_CHANNELS; i++) {
-                int this_minor = sunzilog_reg.minor + i;
-
-                if ((this_minor - 64) == (serial_console - 1))
-                        break;
-        }
-        if (i == NUM_CHANNELS)
-                return 0;
-
-        sunzilog_console.index = i;
-        sunzilog_port_table[i].flags |= SUNZILOG_FLAG_IS_CONS;
-        register_console(&sunzilog_console);
-        return 0;
-}
-
 static inline struct console *SUNZILOG_CONSOLE(void)
 {
         int i;
@@ -1431,101 +1220,8 @@ static inline struct console *SUNZILOG_CONSOLE(void)
 
 #else
 #define SUNZILOG_CONSOLE()      (NULL)
-#define sunzilog_console_init() do { } while (0)
 #endif
 
-/*
- * We scan the PROM tree recursively. This is the most reliable way
- * to find Zilog nodes on various platforms. However, we face an extreme
- * shortage of kernel stack, so we must be very careful. To that end,
- * we scan only to a certain depth, and we use a common property buffer
- * in the scan structure.
- */
-#define ZS_PROPSIZE  128
-#define ZS_SCAN_DEPTH   5
-
-struct zs_probe_scan {
-        int depth;
-        void (*scanner)(struct zs_probe_scan *t, int node);
-
-        int devices;
-        char prop[ZS_PROPSIZE];
-};
-
-static int __inline__ sunzilog_node_ok(int node, const char *name, int len)
-{
-        if (strncmp(name, "zs", len) == 0)
-                return 1;
-        /* Don't fold this procedure just yet. Compare to su_node_ok(). */
-        return 0;
-}
-
-static void __init sunzilog_scan(struct zs_probe_scan *t, int node)
-{
-        int len;
-
-        for (; node != 0; node = prom_getsibling(node)) {
-                len = prom_getproperty(node, "name", t->prop, ZS_PROPSIZE);
-                if (len <= 1)
-                        continue;               /* Broken PROM node */
-                if (sunzilog_node_ok(node, t->prop, len)) {
-                        (*t->scanner)(t, node);
-                } else {
-                        if (t->depth < ZS_SCAN_DEPTH) {
-                                t->depth++;
-                                sunzilog_scan(t, prom_getchild(node));
-                                --t->depth;
-                        }
-                }
-        }
-}
-
-static void __init sunzilog_prepare(void)
-{
-        struct uart_sunzilog_port *up;
-        struct zilog_layout __iomem *rp;
-        int channel, chip;
-
-        /*
-         * Temporary fix.
-         */
-        for (channel = 0; channel < NUM_CHANNELS; channel++)
-                spin_lock_init(&sunzilog_port_table[channel].port.lock);
-
-        sunzilog_irq_chain = up = &sunzilog_port_table[0];
-        for (channel = 0; channel < NUM_CHANNELS - 1; channel++)
-                up[channel].next = &up[channel + 1];
-        up[channel].next = NULL;
-
-        for (chip = 0; chip < NUM_SUNZILOG; chip++) {
-                rp = sunzilog_chip_regs[chip];
-                up[(chip * 2) + 0].port.membase = (void __iomem *)&rp->channelA;
-                up[(chip * 2) + 1].port.membase = (void __iomem *)&rp->channelB;
-
-                /* Channel A */
-                up[(chip * 2) + 0].port.iotype = UPIO_MEM;
-                up[(chip * 2) + 0].port.irq = zilog_irq;
-                up[(chip * 2) + 0].port.uartclk = ZS_CLOCK;
-                up[(chip * 2) + 0].port.fifosize = 1;
-                up[(chip * 2) + 0].port.ops = &sunzilog_pops;
-                up[(chip * 2) + 0].port.type = PORT_SUNZILOG;
-                up[(chip * 2) + 0].port.flags = 0;
-                up[(chip * 2) + 0].port.line = (chip * 2) + 0;
-                up[(chip * 2) + 0].flags |= SUNZILOG_FLAG_IS_CHANNEL_A;
-
-                /* Channel B */
-                up[(chip * 2) + 1].port.iotype = UPIO_MEM;
-                up[(chip * 2) + 1].port.irq = zilog_irq;
-                up[(chip * 2) + 1].port.uartclk = ZS_CLOCK;
-                up[(chip * 2) + 1].port.fifosize = 1;
-                up[(chip * 2) + 1].port.ops = &sunzilog_pops;
-                up[(chip * 2) + 1].port.type = PORT_SUNZILOG;
-                up[(chip * 2) + 1].port.flags = 0;
-                up[(chip * 2) + 1].port.line = (chip * 2) + 1;
-                up[(chip * 2) + 1].flags |= 0;
-        }
-}
-
 static void __init sunzilog_init_kbdms(struct uart_sunzilog_port *up, int channel)
 {
         int baud, brg;
@@ -1539,8 +1235,6 @@ static void __init sunzilog_init_kbdms(struct uart_sunzilog_port *up, int channe
                 up->cflag = B4800 | CS8 | CLOCAL | CREAD;
                 baud = 4800;
         }
-        printk(KERN_INFO "zs%d at 0x%p (irq = %d) is a SunZilog\n",
-               channel, up->port.membase, zilog_irq);
 
         up->curregs[R15] = BRKIE;
         brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR);
@@ -1552,216 +1246,253 @@ static void __init sunzilog_init_kbdms(struct uart_sunzilog_port *up, int channe
 #ifdef CONFIG_SERIO
 static void __init sunzilog_register_serio(struct uart_sunzilog_port *up, int channel)
 {
-        struct serio *serio;
-
-        up->serio = serio = kmalloc(sizeof(struct serio), GFP_KERNEL);
-        if (serio) {
-                memset(serio, 0, sizeof(*serio));
+        struct serio *serio = &up->serio;
 
-                serio->port_data = up;
+        serio->port_data = up;
 
-                serio->id.type = SERIO_RS232;
-                if (channel == KEYBOARD_LINE) {
-                        serio->id.proto = SERIO_SUNKBD;
-                        strlcpy(serio->name, "zskbd", sizeof(serio->name));
-                } else {
-                        serio->id.proto = SERIO_SUN;
-                        serio->id.extra = 1;
-                        strlcpy(serio->name, "zsms", sizeof(serio->name));
-                }
-                strlcpy(serio->phys,
-                        (channel == KEYBOARD_LINE ? "zs/serio0" : "zs/serio1"),
-                        sizeof(serio->phys));
-
-                serio->write = sunzilog_serio_write;
-                serio->open = sunzilog_serio_open;
-                serio->close = sunzilog_serio_close;
-
-                serio_register_port(serio);
+        serio->id.type = SERIO_RS232;
+        if (channel == KEYBOARD_LINE) {
+                serio->id.proto = SERIO_SUNKBD;
+                strlcpy(serio->name, "zskbd", sizeof(serio->name));
         } else {
-                printk(KERN_WARNING "zs%d: not enough memory for serio port\n",
-                        channel);
+                serio->id.proto = SERIO_SUN;
+                serio->id.extra = 1;
+                strlcpy(serio->name, "zsms", sizeof(serio->name));
         }
+        strlcpy(serio->phys,
+                (channel == KEYBOARD_LINE ? "zs/serio0" : "zs/serio1"),
+                sizeof(serio->phys));
+
+        serio->write = sunzilog_serio_write;
+        serio->open = sunzilog_serio_open;
+        serio->close = sunzilog_serio_close;
+        serio->dev.parent = up->port.dev;
+
+        serio_register_port(serio);
 }
 #endif
 
-static void __init sunzilog_init_hw(void)
+static void __init sunzilog_init_hw(struct uart_sunzilog_port *up)
 {
-        int i;
-
-        for (i = 0; i < NUM_CHANNELS; i++) {
-                struct uart_sunzilog_port *up = &sunzilog_port_table[i];
-                struct zilog_channel __iomem *channel = ZILOG_CHANNEL_FROM_PORT(&up->port);
-                unsigned long flags;
-                int baud, brg;
+        struct zilog_channel __iomem *channel;
+        unsigned long flags;
+        int baud, brg;
 
-                spin_lock_irqsave(&up->port.lock, flags);
+        channel = ZILOG_CHANNEL_FROM_PORT(&up->port);
 
-                if (ZS_IS_CHANNEL_A(up)) {
-                        write_zsreg(channel, R9, FHWRES);
-                        ZSDELAY_LONG();
-                        (void) read_zsreg(channel, R0);
-                }
+        spin_lock_irqsave(&up->port.lock, flags);
+        if (ZS_IS_CHANNEL_A(up)) {
+                write_zsreg(channel, R9, FHWRES);
+                ZSDELAY_LONG();
+                (void) read_zsreg(channel, R0);
+        }
 
-                if (i == KEYBOARD_LINE || i == MOUSE_LINE) {
-                        sunzilog_init_kbdms(up, i);
-                        up->curregs[R9] |= (NV | MIE);
-                        write_zsreg(channel, R9, up->curregs[R9]);
-                } else {
-                        /* Normal serial TTY. */
-                        up->parity_mask = 0xff;
-                        up->curregs[R1] = EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB;
-                        up->curregs[R4] = PAR_EVEN | X16CLK | SB1;
-                        up->curregs[R3] = RxENAB | Rx8;
-                        up->curregs[R5] = TxENAB | Tx8;
-                        up->curregs[R9] = NV | MIE;
-                        up->curregs[R10] = NRZ;
-                        up->curregs[R11] = TCBR | RCBR;
-                        baud = 9600;
-                        brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR);
-                        up->curregs[R12] = (brg & 0xff);
-                        up->curregs[R13] = (brg >> 8) & 0xff;
-                        up->curregs[R14] = BRSRC | BRENAB;
-                        __load_zsregs(channel, up->curregs);
-                        write_zsreg(channel, R9, up->curregs[R9]);
-                }
+        if (up->port.line == KEYBOARD_LINE ||
+            up->port.line == MOUSE_LINE) {
+                sunzilog_init_kbdms(up, up->port.line);
+                up->curregs[R9] |= (NV | MIE);
+                write_zsreg(channel, R9, up->curregs[R9]);
+        } else {
+                /* Normal serial TTY. */
+                up->parity_mask = 0xff;
+                up->curregs[R1] = EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB;
+                up->curregs[R4] = PAR_EVEN | X16CLK | SB1;
+                up->curregs[R3] = RxENAB | Rx8;
+                up->curregs[R5] = TxENAB | Tx8;
+                up->curregs[R9] = NV | MIE;
+                up->curregs[R10] = NRZ;
+                up->curregs[R11] = TCBR | RCBR;
+                baud = 9600;
+                brg = BPS_TO_BRG(baud, ZS_CLOCK / ZS_CLOCK_DIVISOR);
+                up->curregs[R12] = (brg & 0xff);
+                up->curregs[R13] = (brg >> 8) & 0xff;
+                up->curregs[R14] = BRSRC | BRENAB;
+                __load_zsregs(channel, up->curregs);
+                write_zsreg(channel, R9, up->curregs[R9]);
+        }
 
-                spin_unlock_irqrestore(&up->port.lock, flags);
+        spin_unlock_irqrestore(&up->port.lock, flags);
 
 #ifdef CONFIG_SERIO
-                if (i == KEYBOARD_LINE || i == MOUSE_LINE)
-                        sunzilog_register_serio(up, i);
+        if (up->port.line == KEYBOARD_LINE || up->port.line == MOUSE_LINE)
+                sunzilog_register_serio(up, up->port.line);
 #endif
-        }
-}
-
-static struct zilog_layout __iomem * __init get_zs(int chip, int node);
-
-static void __init sunzilog_scan_probe(struct zs_probe_scan *t, int node)
-{
-        sunzilog_chip_regs[t->devices] = get_zs(t->devices, node);
-        t->devices++;
 }
 
-static int __init sunzilog_ports_init(void)
+static int __devinit zs_get_instance(struct device_node *dp)
 {
-        struct zs_probe_scan scan;
         int ret;
-        int uart_count;
-        int i;
 
-        printk(KERN_DEBUG "SunZilog: %d chips.\n", NUM_SUNZILOG);
+        ret = of_getintprop_default(dp, "slave", -1);
+        if (ret != -1)
+                return ret;
 
-        scan.scanner = sunzilog_scan_probe;
-        scan.depth = 0;
-        scan.devices = 0;
-        sunzilog_scan(&scan, prom_getchild(prom_root_node));
+        if (of_find_property(dp, "keyboard", NULL))
+                ret = 1;
+        else
+                ret = 0;
 
-        sunzilog_prepare();
+        return ret;
+}
 
-        if (request_irq(zilog_irq, sunzilog_interrupt, SA_SHIRQ,
-                        "SunZilog", sunzilog_irq_chain)) {
-                prom_printf("SunZilog: Unable to register zs interrupt handler.\n");
-                prom_halt();
-        }
+static int __devinit zs_probe(struct of_device *dev, const struct of_device_id *match)
+{
+        static int zilog_irq = -1;
+        struct of_device *op = to_of_device(&dev->dev);
+        struct uart_sunzilog_port *up;
+        struct zilog_layout __iomem *rp;
+        int inst = zs_get_instance(dev->node);
+        int err;
 
-        sunzilog_init_hw();
+        sunzilog_chip_regs[inst] = of_ioremap(&op->resource[0], 0,
+                                              sizeof(struct zilog_layout),
+                                              "zs");
+        if (!sunzilog_chip_regs[inst])
+                return -ENOMEM;
 
-        /* We can only init this once we have probed the Zilogs
-         * in the system. Do not count channels assigned to keyboards
-         * or mice when we are deciding how many ports to register.
-         */
-        uart_count = 0;
-        for (i = 0; i < NUM_CHANNELS; i++) {
-                struct uart_sunzilog_port *up = &sunzilog_port_table[i];
+        rp = sunzilog_chip_regs[inst];
 
-                if (ZS_IS_KEYB(up) || ZS_IS_MOUSE(up))
-                        continue;
+        if (zilog_irq == -1) {
+                zilog_irq = op->irqs[0];
+                err = request_irq(zilog_irq, sunzilog_interrupt, SA_SHIRQ,
+                                  "zs", sunzilog_irq_chain);
+                if (err) {
+                        of_iounmap(rp, sizeof(struct zilog_layout));
 
-                uart_count++;
+                        return err;
+                }
         }
-                
-        sunzilog_reg.nr = uart_count;
-        sunzilog_reg.minor = sunserial_current_minor;
-
-        ret = uart_register_driver(&sunzilog_reg);
-        if (ret == 0) {
-                sunzilog_reg.tty_driver->name_base = sunzilog_reg.minor - 64;
-                sunzilog_reg.cons = SUNZILOG_CONSOLE();
 
-                sunserial_current_minor += uart_count;
-
-                for (i = 0; i < NUM_CHANNELS; i++) {
-                        struct uart_sunzilog_port *up = &sunzilog_port_table[i];
-
-                        if (ZS_IS_KEYB(up) || ZS_IS_MOUSE(up))
-                                continue;
-
-                        if (uart_add_one_port(&sunzilog_reg, &up->port)) {
-                                printk(KERN_ERR
-                                    "SunZilog: failed to add port zs%d\n", i);
-                        }
+        up = &sunzilog_port_table[inst * 2];
+
+        /* Channel A */
+        up[0].port.mapbase = op->resource[0].start + 0x00;
+        up[0].port.membase = (void __iomem *) &rp->channelA;
+        up[0].port.iotype = UPIO_MEM;
+        up[0].port.irq = op->irqs[0];
+        up[0].port.uartclk = ZS_CLOCK;
+        up[0].port.fifosize = 1;
+        up[0].port.ops = &sunzilog_pops;
+        up[0].port.type = PORT_SUNZILOG;
+        up[0].port.flags = 0;
+        up[0].port.line = (inst * 2) + 0;
+        up[0].port.dev = &op->dev;
+        up[0].flags |= SUNZILOG_FLAG_IS_CHANNEL_A;
+        if (inst == 1)
+                up[0].flags |= SUNZILOG_FLAG_CONS_KEYB;
+        sunzilog_init_hw(&up[0]);
+
+        /* Channel B */
+        up[1].port.mapbase = op->resource[0].start + 0x04;
+        up[1].port.membase = (void __iomem *) &rp->channelB;
+        up[1].port.iotype = UPIO_MEM;
+        up[1].port.irq = op->irqs[0];
+        up[1].port.uartclk = ZS_CLOCK;
+        up[1].port.fifosize = 1;
+        up[1].port.ops = &sunzilog_pops;
+        up[1].port.type = PORT_SUNZILOG;
+        up[1].port.flags = 0;
+        up[1].port.line = (inst * 2) + 1;
+        up[1].port.dev = &op->dev;
+        up[1].flags |= 0;
+        if (inst == 1)
+                up[1].flags |= SUNZILOG_FLAG_CONS_MOUSE;
+        sunzilog_init_hw(&up[1]);
+
+        if (inst != 1) {
+                err = uart_add_one_port(&sunzilog_reg, &up[0].port);
+                if (err) {
+                        of_iounmap(rp, sizeof(struct zilog_layout));
+                        return err;
+                }
+                err = uart_add_one_port(&sunzilog_reg, &up[1].port);
+                if (err) {
+                        uart_remove_one_port(&sunzilog_reg, &up[0].port);
+                        of_iounmap(rp, sizeof(struct zilog_layout));
+                        return err;
                 }
         }
 
-        return ret;
-}
-
-static void __init sunzilog_scan_count(struct zs_probe_scan *t, int node)
-{
-        t->devices++;
+        return 0;
 }
 
-static int __init sunzilog_ports_count(void)
+static int __devexit zs_remove(struct of_device *dev)
 {
-        struct zs_probe_scan scan;
+        struct uart_sunzilog_port *up = dev_get_drvdata(&dev->dev);
+        struct zilog_channel __iomem *channel;
 
-        /* Sun4 Zilog setup is hard coded, no probing to do.  */
-        if (sparc_cpu_model == sun4)
-                return 2;
+        if (ZS_IS_KEYB(up) || ZS_IS_MOUSE(up)) {
+#ifdef CONFIG_SERIO
+                serio_unregister_port(&up->serio);
+#endif
+        } else
+                uart_remove_one_port(&sunzilog_reg, &up->port);
 
-        scan.scanner = sunzilog_scan_count;
-        scan.depth = 0;
-        scan.devices = 0;
+        channel = ZILOG_CHANNEL_FROM_PORT(&up->port);
 
-        sunzilog_scan(&scan, prom_getchild(prom_root_node));
+        of_iounmap(channel, sizeof(struct zilog_channel));
 
-        return scan.devices;
+        return 0;
 }
 
+static struct of_device_id zs_match[] = {
+        {
+                .name = "zs",
+        },
+        {},
+};
+MODULE_DEVICE_TABLE(of, zs_match);
+
+static struct of_platform_driver zs_driver = {
+        .name           = "zs",
+        .match_table    = zs_match,
+        .probe          = zs_probe,
+        .remove         = __devexit_p(zs_remove),
+};
+
 static int __init sunzilog_init(void)
 {
+        struct device_node *dp;
+        int err;
 
-        NUM_SUNZILOG = sunzilog_ports_count();
-        if (NUM_SUNZILOG == 0)
-                return -ENODEV;
+        NUM_SUNZILOG = 0;
+        for_each_node_by_name(dp, "zs")
+                NUM_SUNZILOG++;
 
-        sunzilog_alloc_tables();
+        if (NUM_SUNZILOG) {
+                int uart_count;
 
-        sunzilog_ports_init();
+                err = sunzilog_alloc_tables();
+                if (err)
+                        return err;
 
-        return 0;
+                /* Subtract 1 for keyboard, 1 for mouse.  */
+                uart_count = (NUM_SUNZILOG * 2) - 2;
+
+                sunzilog_reg.nr = uart_count;
+                sunzilog_reg.minor = sunserial_current_minor;
+                err = uart_register_driver(&sunzilog_reg);
+                if (err) {
+                        sunzilog_free_tables();
+                        return err;
+                }
+                sunzilog_reg.tty_driver->name_base = sunzilog_reg.minor - 64;
+                sunzilog_reg.cons = SUNZILOG_CONSOLE();
+
+                sunserial_current_minor += uart_count;
+        }
+
+        return of_register_driver(&zs_driver, &of_bus_type);
 }
 
 static void __exit sunzilog_exit(void)
 {
-        int i;
+        of_unregister_driver(&zs_driver);
 
-        for (i = 0; i < NUM_CHANNELS; i++) {
-                struct uart_sunzilog_port *up = &sunzilog_port_table[i];
-
-                if (ZS_IS_KEYB(up) || ZS_IS_MOUSE(up)) {
-#ifdef CONFIG_SERIO
-                        if (up->serio) {
-                                serio_unregister_port(up->serio);
-                                up->serio = NULL;
-                        }
-#endif
-                } else
-                        uart_remove_one_port(&sunzilog_reg, &up->port);
+        if (NUM_SUNZILOG) {
+                uart_unregister_driver(&sunzilog_reg);
+                sunzilog_free_tables();
         }
-
-        uart_unregister_driver(&sunzilog_reg);
 }
 
 module_init(sunzilog_init);