[PATCH] ppc32 CPM_UART: fixes and improvements

A number of small issues are fixed, and added the header file, missed from the
original series. With this, driver should be pretty stable as tested among
both platform-device-driven and "old way" boards. Also added missing GPL
statement , and updated year field on existing ones to reflect
code update.
Signed-off-by: Vitaly Bordug <vbordug@ru.mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/ppc/platforms/mpc866ads_setup.c

@@ -378,7 +378,7 @@ int __init mpc866ads_init(void)
 	ppc_sys_device_setfunc(MPC8xx_CPM_SMC1, PPC_SYS_FUNC_UART);
 #endif
 
-#ifdef CONFIG_SERIAL_CPM_SMCer
+#ifdef CONFIG_SERIAL_CPM_SMC
 	ppc_sys_device_enable(MPC8xx_CPM_SMC2);
 	ppc_sys_device_setfunc(MPC8xx_CPM_SMC2, PPC_SYS_FUNC_UART);
 #endif

drivers/serial/cpm_uart/cpm_uart.h

@@ -5,6 +5,13 @@
  *
  *  Copyright (C) 2004 Freescale Semiconductor, Inc.
  *
+ *  2006 (c) MontaVista Software, Inc.
+ * 	Vitaly Bordug <vbordug@ru.mvista.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ *
  */
 #ifndef CPM_UART_H
 #define CPM_UART_H
@@ -101,12 +108,13 @@ static inline unsigned long cpu2cpm_addr(void* addr, struct uart_cpm_port *pinfo
 	int offset;
 	u32 val = (u32)addr;
 	/* sane check */
-	if ((val >= (u32)pinfo->mem_addr) &&
+	if (likely((val >= (u32)pinfo->mem_addr)) &&
 			(val<((u32)pinfo->mem_addr + pinfo->mem_size))) {
 		offset = val - (u32)pinfo->mem_addr;
 		return pinfo->dma_addr+offset;
 	}
-	printk("%s(): address %x to translate out of range!\n", __FUNCTION__, val);
+	/* something nasty happened */
+	BUG();
 	return 0;
 }
 
@@ -115,12 +123,13 @@ static inline void *cpm2cpu_addr(unsigned long addr, struct uart_cpm_port *pinfo
 	int offset;
 	u32 val = addr;
 	/* sane check */
-	if ((val >= pinfo->dma_addr) &&
-			(val<(pinfo->dma_addr + pinfo->mem_size))) {
+	if (likely((val >= pinfo->dma_addr) &&
+			(val<(pinfo->dma_addr + pinfo->mem_size)))) {
 		offset = val - (u32)pinfo->dma_addr;
 		return (void*)(pinfo->mem_addr+offset);
 	}
-	printk("%s(): address %x to translate out of range!\n", __FUNCTION__, val);
+	/* something nasty happened */
+	BUG();
 	return 0;
 }
 

drivers/serial/cpm_uart/cpm_uart_core.c

@@ -12,7 +12,8 @@
  *
  *  Copyright (C) 2004 Freescale Semiconductor, Inc.
  *            (C) 2004 Intracom, S.A.
- *            (C) 2005 MontaVista Software, Inc. by Vitaly Bordug <vbordug@ru.mvista.com>
+ *            (C) 2005-2006 MontaVista Software, Inc.
+ * 		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
@@ -81,7 +82,7 @@ early_uart_get_pdev(int index)
 }
 
 
-void cpm_uart_count(void)
+static void cpm_uart_count(void)
 {
 	cpm_uart_nr = 0;
 #ifdef CONFIG_SERIAL_CPM_SMC1
@@ -104,6 +105,21 @@ void cpm_uart_count(void)
 #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;
+}
+
 /*
  * Check, if transmit buffers are processed
 */
@@ -1012,7 +1028,11 @@ int cpm_uart_drv_get_platform_data(struct platform_device *pdev, int is_con)
 	int line;
 	u32 mem, pram;
 
-	for (line=0; line<UART_NR && cpm_uart_port_map[line]!=pdata->fs_no; line++);
+	line = cpm_uart_id2nr(idx);
+	if(line < 0) {
+		printk(KERN_ERR"%s(): port %d is not registered", __FUNCTION__, idx);
+		return -1;
+	}
 
 	pinfo = (struct uart_cpm_port *) &cpm_uart_ports[idx];
 
@@ -1245,8 +1265,7 @@ static int cpm_uart_drv_probe(struct device *dev)
 	}
 
 	pdata = pdev->dev.platform_data;
-	pr_debug("cpm_uart_drv_probe: Adding CPM UART %d\n",
-			cpm_uart_port_map[pdata->fs_no]);
+	pr_debug("cpm_uart_drv_probe: Adding CPM UART %d\n", cpm_uart_id2nr(pdata->fs_no));
 
 	if ((ret = cpm_uart_drv_get_platform_data(pdev, 0)))
 		return ret;
@@ -1265,7 +1284,7 @@ static int cpm_uart_drv_remove(struct 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_port_map[pdata->fs_no]);
+			cpm_uart_id2nr(pdata->fs_no));
 
         uart_remove_one_port(&cpm_reg, &cpm_uart_ports[pdata->fs_no].port);
         return 0;

drivers/serial/cpm_uart/cpm_uart_cpm1.c

@@ -8,6 +8,8 @@
  *
  *  Copyright (C) 2004 Freescale Semiconductor, Inc.
  *            (C) 2004 Intracom, S.A.
+ *            (C) 2006 MontaVista Software, Inc.
+ * 		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

drivers/serial/cpm_uart/cpm_uart_cpm2.c

@@ -8,6 +8,8 @@
  * 
  *  Copyright (C) 2004 Freescale Semiconductor, Inc.
  *            (C) 2004 Intracom, S.A.
+ *            (C) 2006 MontaVista Software, Inc.
+ * 		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/fs_uart_pd.h

+/*
+ * Platform information definitions for the CPM Uart driver.
+ *
+ * 2006 (c) MontaVista Software, Inc.
+ * Vitaly Bordug <vbordug@ru.mvista.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#ifndef FS_UART_PD_H
+#define FS_UART_PD_H
+
+#include <linux/version.h>
+#include <asm/types.h>
+
+enum fs_uart_id {
+	fsid_smc1_uart,
+	fsid_smc2_uart,
+	fsid_scc1_uart,
+	fsid_scc2_uart,
+	fsid_scc3_uart,
+	fsid_scc4_uart,
+	fs_uart_nr,
+};
+
+static inline int fs_uart_id_scc2fsid(int id)
+{
+    return fsid_scc1_uart + id - 1;
+}
+
+static inline int fs_uart_id_fsid2scc(int id)
+{
+    return id - fsid_scc1_uart + 1;
+}
+
+static inline int fs_uart_id_smc2fsid(int id)
+{
+    return fsid_smc1_uart + id - 1;
+}
+
+static inline int fs_uart_id_fsid2smc(int id)
+{
+    return id - fsid_smc1_uart + 1;
+}
+
+struct fs_uart_platform_info {
+        void(*init_ioports)(void);
+	/* device specific information */
+	int fs_no;		/* controller index */
+	u32 uart_clk;
+	u8 tx_num_fifo;
+	u8 tx_buf_size;
+	u8 rx_num_fifo;
+	u8 rx_buf_size;
+	u8 brg;
+};
+
+#endif