[POWERPC] cpm_uart: Be an of_platform device when CONFIG_PPC_CPM_NEW_BINDING is set.

The existing OF glue code was crufty and broken.  Rather than fix it,
it has been removed, and the serial driver now talks to the device tree
directly.

The non-CONFIG_PPC_CPM_NEW_BINDING code can go away once CPM platforms
are dropped from arch/ppc (which will hopefully be soon), and existing
arch/powerpc boards that I wasn't able to test on for this patchset get
converted (which should be even sooner).

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 219 insertions, 22 deletions

diff --git a/drivers/serial/cpm_uart/cpm_uart_core.c b/drivers/serial/cpm_uart/cpm_uart_core.c
index cefde58dbad2..8564ba2f3ec2 100644
--- a/drivers/serial/cpm_uart/cpm_uart_core.c
+++ b/drivers/serial/cpm_uart/cpm_uart_core.c
@@ -10,7 +10,7 @@
  *  Maintainer: Kumar Gala (galak@kernel.crashing.org) (CPM2)
  *              Pantelis Antoniou (panto@intracom.gr) (CPM1)
  *
- *  Copyright (C) 2004 Freescale Semiconductor, Inc.
+ *  Copyright (C) 2004, 2007 Freescale Semiconductor, Inc.
  *            (C) 2004 Intracom, S.A.
  *            (C) 2005-2006 MontaVista Software, Inc.
  * 		Vitaly Bordug <vbordug@ru.mvista.com>
@@ -47,6 +47,11 @@
 #include <asm/irq.h>
 #include <asm/delay.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
@@ -57,12 +62,6 @@
 
 #include "cpm_uart.h"
 
-/***********************************************************************/
-
-/* 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 = 0;
 
 /**************************************************************/
 
@@ -73,6 +72,11 @@ static void cpm_uart_initbd(struct uart_cpm_port *pinfo);
 
 /**************************************************************/
 
+#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
@@ -119,6 +123,7 @@ static int cpm_uart_id2nr(int id)
 	/* not found or invalid argument */
 	return -1;
 }
+#endif
 
 /*
  * Check, if transmit buffers are processed
@@ -232,15 +237,14 @@ static void cpm_uart_enable_ms(struct uart_port *port)
 static void cpm_uart_break_ctl(struct uart_port *port, int break_state)
 {
 	struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
-	int line = pinfo - cpm_uart_ports;
 
 	pr_debug("CPM uart[%d]:break ctrl, break_state: %d\n", port->line,
 		break_state);
 
 	if (break_state)
-		cpm_line_cr_cmd(line, CPM_CR_STOP_TX);
+		cpm_line_cr_cmd(pinfo, CPM_CR_STOP_TX);
 	else
-		cpm_line_cr_cmd(line, CPM_CR_RESTART_TX);
+		cpm_line_cr_cmd(pinfo, CPM_CR_RESTART_TX);
 }
 
 /*
@@ -407,7 +411,6 @@ static int cpm_uart_startup(struct uart_port *port)
 {
 	int retval;
 	struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
-	int line = pinfo - cpm_uart_ports;
 
 	pr_debug("CPM uart[%d]:startup\n", port->line);
 
@@ -426,7 +429,7 @@ static int cpm_uart_startup(struct uart_port *port)
 	}
 
 	if (!(pinfo->flags & FLAG_CONSOLE))
-		cpm_line_cr_cmd(line,CPM_CR_INIT_TRX);
+		cpm_line_cr_cmd(pinfo, CPM_CR_INIT_TRX);
 	return 0;
 }
 
@@ -442,7 +445,6 @@ inline void cpm_uart_wait_until_send(struct uart_cpm_port *pinfo)
 static void cpm_uart_shutdown(struct uart_port *port)
 {
 	struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port;
-	int line = pinfo - cpm_uart_ports;
 
 	pr_debug("CPM uart[%d]:shutdown\n", port->line);
 
@@ -473,9 +475,9 @@ static void cpm_uart_shutdown(struct uart_port *port)
 
 		/* Shut them really down and reinit buffer descriptors */
 		if (IS_SMC(pinfo))
-			cpm_line_cr_cmd(line, CPM_CR_STOP_TX);
+			cpm_line_cr_cmd(pinfo, CPM_CR_STOP_TX);
 		else
-			cpm_line_cr_cmd(line, CPM_CR_GRA_STOP_TX);
+			cpm_line_cr_cmd(pinfo, CPM_CR_GRA_STOP_TX);
 
 		cpm_uart_initbd(pinfo);
 	}
@@ -595,7 +597,6 @@ static void cpm_uart_set_termios(struct uart_port *port,
 
 	cpm_set_brg(pinfo->brg - 1, baud);
 	spin_unlock_irqrestore(&port->lock, flags);
-
 }
 
 static const char *cpm_uart_type(struct uart_port *port)
@@ -742,7 +743,6 @@ static void cpm_uart_initbd(struct uart_cpm_port *pinfo)
 
 static void cpm_uart_init_scc(struct uart_cpm_port *pinfo)
 {
-	int line = pinfo - cpm_uart_ports;
 	volatile scc_t *scp;
 	volatile scc_uart_t *sup;
 
@@ -783,7 +783,7 @@ static void cpm_uart_init_scc(struct uart_cpm_port *pinfo)
 
 	/* Send the CPM an initialize command.
 	 */
-	cpm_line_cr_cmd(line, CPM_CR_INIT_TRX);
+	cpm_line_cr_cmd(pinfo, CPM_CR_INIT_TRX);
 
 	/* Set UART mode, 8 bit, no parity, one stop.
 	 * Enable receive and transmit.
@@ -803,7 +803,6 @@ static void cpm_uart_init_scc(struct uart_cpm_port *pinfo)
 
 static void cpm_uart_init_smc(struct uart_cpm_port *pinfo)
 {
-	int line = pinfo - cpm_uart_ports;
 	volatile smc_t *sp;
 	volatile smc_uart_t *up;
 
@@ -840,7 +839,7 @@ static void cpm_uart_init_smc(struct uart_cpm_port *pinfo)
 	up->smc_brkec = 0;
 	up->smc_brkcr = 1;
 
-	cpm_line_cr_cmd(line, CPM_CR_INIT_TRX);
+	cpm_line_cr_cmd(pinfo, CPM_CR_INIT_TRX);
 
 	/* Set UART mode, 8 bit, no parity, one stop.
 	 * Enable receive and transmit.
@@ -929,6 +928,85 @@ static struct uart_ops cpm_uart_pops = {
 	.verify_port	= cpm_uart_verify_port,
 };
 
+#ifdef CONFIG_PPC_CPM_NEW_BINDING
+struct uart_cpm_port cpm_uart_ports[UART_NR];
+
+int cpm_uart_init_port(struct device_node *np, struct uart_cpm_port *pinfo)
+{
+	const u32 *data;
+	void __iomem *mem, __iomem *pram;
+	int len;
+	int ret;
+
+	data = of_get_property(np, "fsl,cpm-brg", &len);
+	if (!data || len != 4) {
+		printk(KERN_ERR "CPM UART %s has no/invalid "
+		                "fsl,cpm-brg property.\n", np->name);
+		return -EINVAL;
+	}
+	pinfo->brg = *data;
+
+	data = of_get_property(np, "fsl,cpm-command", &len);
+	if (!data || len != 4) {
+		printk(KERN_ERR "CPM UART %s has no/invalid "
+		                "fsl,cpm-command property.\n", np->name);
+		return -EINVAL;
+	}
+	pinfo->command = *data;
+
+	mem = of_iomap(np, 0);
+	if (!mem)
+		return -ENOMEM;
+
+	pram = of_iomap(np, 1);
+	if (!pram) {
+		ret = -ENOMEM;
+		goto out_mem;
+	}
+
+	if (of_device_is_compatible(np, "fsl,cpm1-scc-uart") ||
+	    of_device_is_compatible(np, "fsl,cpm2-scc-uart")) {
+		pinfo->sccp = mem;
+		pinfo->sccup = pram;
+	} else if (of_device_is_compatible(np, "fsl,cpm1-smc-uart") ||
+	           of_device_is_compatible(np, "fsl,cpm2-smc-uart")) {
+		pinfo->flags |= FLAG_SMC;
+		pinfo->smcp = mem;
+		pinfo->smcup = pram;
+	} else {
+		ret = -ENODEV;
+		goto out_pram;
+	}
+
+	pinfo->tx_nrfifos = TX_NUM_FIFO;
+	pinfo->tx_fifosize = TX_BUF_SIZE;
+	pinfo->rx_nrfifos = RX_NUM_FIFO;
+	pinfo->rx_fifosize = RX_BUF_SIZE;
+
+	pinfo->port.uartclk = ppc_proc_freq;
+	pinfo->port.mapbase = (unsigned long)mem;
+	pinfo->port.type = PORT_CPM;
+	pinfo->port.ops = &cpm_uart_pops,
+	pinfo->port.iotype = UPIO_MEM;
+	spin_lock_init(&pinfo->port.lock);
+
+	pinfo->port.irq = of_irq_to_resource(np, 0, NULL);
+	if (pinfo->port.irq == NO_IRQ) {
+		ret = -EINVAL;
+		goto out_pram;
+	}
+
+	return cpm_uart_request_port(&pinfo->port);
+
+out_pram:
+	iounmap(pram);
+out_mem:
+	iounmap(mem);
+	return ret;
+}
+
+#else
+
 struct uart_cpm_port cpm_uart_ports[UART_NR] = {
 	[UART_SMC1] = {
 		.port = {
@@ -1072,6 +1150,7 @@ int cpm_uart_drv_get_platform_data(struct platform_device *pdev, int is_con)
 
 	return 0;
 }
+#endif
 
 #ifdef CONFIG_SERIAL_CPM_CONSOLE
 /*
@@ -1083,8 +1162,12 @@ int cpm_uart_drv_get_platform_data(struct platform_device *pdev, int is_con)
 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;
 	volatile cbd_t *bdp, *bdbase;
 	volatile unsigned char *cp;
@@ -1155,13 +1238,47 @@ static void cpm_uart_console_write(struct console *co, const char *s,
 
 static int __init cpm_uart_console_setup(struct console *co, char *options)
 {
-	struct uart_port *port;
-	struct uart_cpm_port *pinfo;
 	int baud = 38400;
 	int bits = 8;
 	int parity = 'n';
 	int flow = 'n';
 	int ret;
+	struct uart_cpm_port *pinfo;
+	struct uart_port *port;
+
+#ifdef CONFIG_PPC_CPM_NEW_BINDING
+	struct device_node *np = NULL;
+	int i = 0;
+
+	if (co->index >= UART_NR) {
+		printk(KERN_ERR "cpm_uart: console index %d too high\n",
+		       co->index);
+		return -ENODEV;
+	}
+
+	do {
+		np = of_find_node_by_type(np, "serial");
+		if (!np)
+			return -ENODEV;
+
+		if (!of_device_is_compatible(np, "fsl,cpm1-smc-uart") &&
+		    !of_device_is_compatible(np, "fsl,cpm1-scc-uart") &&
+		    !of_device_is_compatible(np, "fsl,cpm2-smc-uart") &&
+		    !of_device_is_compatible(np, "fsl,cpm2-scc-uart"))
+			i--;
+	} while (i++ != co->index);
+
+	pinfo = &cpm_uart_ports[co->index];
+
+	pinfo->flags |= FLAG_CONSOLE;
+	port = &pinfo->port;
+
+	ret = cpm_uart_init_port(np, pinfo);
+	of_node_put(np);
+	if (ret)
+		return ret;
+
+#else
 
 	struct fs_uart_platform_info *pdata;
 	struct platform_device* pdev = early_uart_get_pdev(co->index);
@@ -1188,6 +1305,7 @@ static int __init cpm_uart_console_setup(struct console *co, char *options)
 	}
 
 	pinfo->flags |= FLAG_CONSOLE;
+#endif
 
 	if (options) {
 		uart_parse_options(options, &baud, &parity, &bits, &flow);
@@ -1196,6 +1314,10 @@ static int __init cpm_uart_console_setup(struct console *co, char *options)
 			baud = 9600;
 	}
 
+#ifdef CONFIG_PPC_EARLY_DEBUG_CPM
+	udbg_putc = NULL;
+#endif
+
 	if (IS_SMC(pinfo)) {
 		pinfo->smcp->smc_smcm &= ~(SMCM_RX | SMCM_TX);
 		pinfo->smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
@@ -1252,7 +1374,81 @@ static struct uart_driver cpm_reg = {
 	.major		= SERIAL_CPM_MAJOR,
 	.minor		= SERIAL_CPM_MINOR,
 	.cons		= CPM_UART_CONSOLE,
+	.nr		= UART_NR,
+};
+
+#ifdef CONFIG_PPC_CPM_NEW_BINDING
+static int probe_index;
+
+static int __devinit cpm_uart_probe(struct of_device *ofdev,
+                                    const struct of_device_id *match)
+{
+	int index = probe_index++;
+	struct uart_cpm_port *pinfo = &cpm_uart_ports[index];
+	int ret;
+
+	pinfo->port.line = index;
+
+	if (index >= UART_NR)
+		return -ENODEV;
+
+	dev_set_drvdata(&ofdev->dev, pinfo);
+
+	ret = cpm_uart_init_port(ofdev->node, pinfo);
+	if (ret)
+		return ret;
+
+	return uart_add_one_port(&cpm_reg, &pinfo->port);
+}
+
+static int __devexit cpm_uart_remove(struct of_device *ofdev)
+{
+	struct uart_cpm_port *pinfo = dev_get_drvdata(&ofdev->dev);
+	return uart_remove_one_port(&cpm_reg, &pinfo->port);
+}
+
+static struct of_device_id cpm_uart_match[] = {
+	{
+		.compatible = "fsl,cpm1-smc-uart",
+	},
+	{
+		.compatible = "fsl,cpm1-scc-uart",
+	},
+	{
+		.compatible = "fsl,cpm2-smc-uart",
+	},
+	{
+		.compatible = "fsl,cpm2-scc-uart",
+	},
+	{}
 };
+
+static struct of_platform_driver cpm_uart_driver = {
+	.name = "cpm_uart",
+	.match_table = cpm_uart_match,
+	.probe = cpm_uart_probe,
+	.remove = cpm_uart_remove,
+ };
+
+static int __init cpm_uart_init(void)
+{
+	int ret = uart_register_driver(&cpm_reg);
+	if (ret)
+		return ret;
+
+	ret = of_register_platform_driver(&cpm_uart_driver);
+	if (ret)
+		uart_unregister_driver(&cpm_reg);
+
+	return ret;
+}
+
+static void __exit cpm_uart_exit(void)
+{
+	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);
@@ -1380,6 +1576,7 @@ static void __exit cpm_uart_exit(void)
 	driver_unregister(&cpm_smc_uart_driver);
 	uart_unregister_driver(&cpm_reg);
 }
+#endif
 
 module_init(cpm_uart_init);
 module_exit(cpm_uart_exit);