[POWERPC] 8xx: Infrastructure code cleanup.

1. Keep a global mpc8xx_immr mapping, rather than constantly
creating temporary mappings.
2. Look for new fsl,cpm1 and fsl,cpm1-pic names.
3. Always reset the CPM when not using the udbg console;
this is required in case the firmware initialized a device
that is incompatible with one that the kernel is about to
use.
4. Remove some superfluous casts and header includes.
5. Change a usage of IMAP_ADDR to get_immrbase().
6. Use phys_addr_t, not uint, for dpram_pbase.
7. Various sparse-related fixes, such as __iomem annotations.
8. Remove mpc8xx_show_cpuinfo, which doesn't provide anything
useful beyond the generic cpuinfo handler.
9. Move prototypes for 8xx support functions from board files
to sysdev/commproc.h.

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

8 files changed, 81 insertions, 133 deletions

diff --git a/arch/powerpc/platforms/8xx/m8xx_setup.c b/arch/powerpc/platforms/8xx/m8xx_setup.c
index b2b98dd8be6a..d35eda80e9e6 100644
--- a/arch/powerpc/platforms/8xx/m8xx_setup.c
+++ b/arch/powerpc/platforms/8xx/m8xx_setup.c
@@ -10,57 +10,33 @@
  * bootup setup stuff..
  */
 
-#include <linux/errno.h>
-#include <linux/sched.h>
 #include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/stddef.h>
-#include <linux/unistd.h>
-#include <linux/ptrace.h>
 #include <linux/slab.h>
-#include <linux/user.h>
-#include <linux/a.out.h>
-#include <linux/tty.h>
-#include <linux/major.h>
 #include <linux/interrupt.h>
-#include <linux/reboot.h>
 #include <linux/init.h>
-#include <linux/initrd.h>
-#include <linux/ioport.h>
-#include <linux/bootmem.h>
-#include <linux/seq_file.h>
-#include <linux/root_dev.h>
 #include <linux/time.h>
 #include <linux/rtc.h>
-#include <linux/fsl_devices.h>
 
-#include <asm/mmu.h>
-#include <asm/reg.h>
 #include <asm/io.h>
-#include <asm/pgtable.h>
 #include <asm/mpc8xx.h>
 #include <asm/8xx_immap.h>
-#include <asm/machdep.h>
-#include <asm/time.h>
 #include <asm/prom.h>
 #include <asm/fs_pd.h>
 #include <mm/mmu_decl.h>
 
-#include "sysdev/mpc8xx_pic.h"
+#include <sysdev/mpc8xx_pic.h>
+#include <sysdev/commproc.h>
 
 #ifdef CONFIG_PCMCIA_M8XX
 struct mpc8xx_pcmcia_ops m8xx_pcmcia_ops;
 #endif
 
 void m8xx_calibrate_decr(void);
-#ifdef CONFIG_8xx_WDT
-extern void m8xx_wdt_handler_install(bd_t *bp);
-#endif
 extern int cpm_pic_init(void);
 extern int cpm_get_irq(void);
 
 /* A place holder for time base interrupts, if they are ever enabled. */
-irqreturn_t timebase_interrupt(int irq, void * dev)
+static irqreturn_t timebase_interrupt(int irq, void *dev)
 {
         printk ("timebase_interrupt()\n");
 
@@ -77,7 +53,7 @@ static struct irqaction tbint_irqaction = {
 void __init __attribute__ ((weak))
 init_internal_rtc(void)
 {
-        sit8xx_t *sys_tmr = (sit8xx_t *) immr_map(im_sit);
+        sit8xx_t __iomem *sys_tmr = immr_map(im_sit);
 
         /* Disable the RTC one second and alarm interrupts. */
         clrbits16(&sys_tmr->sit_rtcsc, (RTCSC_SIE | RTCSC_ALE));
@@ -116,13 +92,13 @@ static int __init get_freq(char *name, unsigned long *val)
 void __init mpc8xx_calibrate_decr(void)
 {
         struct device_node *cpu;
-        cark8xx_t *clk_r1;
-        car8xx_t *clk_r2;
-        sitk8xx_t *sys_tmr1;
-        sit8xx_t *sys_tmr2;
+        cark8xx_t __iomem *clk_r1;
+        car8xx_t __iomem *clk_r2;
+        sitk8xx_t __iomem *sys_tmr1;
+        sit8xx_t __iomem *sys_tmr2;
         int irq, virq;
 
-        clk_r1 = (cark8xx_t *) immr_map(im_clkrstk);
+        clk_r1 = immr_map(im_clkrstk);
 
         /* Unlock the SCCR. */
         out_be32(&clk_r1->cark_sccrk, ~KAPWR_KEY);
@@ -130,7 +106,7 @@ void __init mpc8xx_calibrate_decr(void)
         immr_unmap(clk_r1);
 
         /* Force all 8xx processors to use divide by 16 processor clock. */
-        clk_r2 = (car8xx_t *) immr_map(im_clkrst);
+        clk_r2 = immr_map(im_clkrst);
         setbits32(&clk_r2->car_sccr, 0x02000000);
         immr_unmap(clk_r2);
 
@@ -164,7 +140,7 @@ void __init mpc8xx_calibrate_decr(void)
          * we guarantee the registers are locked, then we unlock them
          * for our use.
          */
-        sys_tmr1 = (sitk8xx_t *) immr_map(im_sitk);
+        sys_tmr1 = immr_map(im_sitk);
         out_be32(&sys_tmr1->sitk_tbscrk, ~KAPWR_KEY);
         out_be32(&sys_tmr1->sitk_rtcsck, ~KAPWR_KEY);
         out_be32(&sys_tmr1->sitk_tbk, ~KAPWR_KEY);
@@ -184,20 +160,13 @@ void __init mpc8xx_calibrate_decr(void)
         virq= irq_of_parse_and_map(cpu, 0);
         irq = irq_map[virq].hwirq;
 
-        sys_tmr2 = (sit8xx_t *) immr_map(im_sit);
+        sys_tmr2 = immr_map(im_sit);
         out_be16(&sys_tmr2->sit_tbscr, ((1 << (7 - (irq/2))) << 8) |
                                         (TBSCR_TBF | TBSCR_TBE));
         immr_unmap(sys_tmr2);
 
         if (setup_irq(virq, &tbint_irqaction))
                 panic("Could not allocate timer IRQ!");
-
-#ifdef CONFIG_8xx_WDT
-        /* Install watchdog timer handler early because it might be
-         * already enabled by the bootloader
-         */
-        m8xx_wdt_handler_install(binfo);
-#endif
 }
 
 /* The RTC on the MPC8xx is an internal register.
@@ -207,12 +176,12 @@ void __init mpc8xx_calibrate_decr(void)
 
 int mpc8xx_set_rtc_time(struct rtc_time *tm)
 {
-        sitk8xx_t *sys_tmr1;
-        sit8xx_t *sys_tmr2;
+        sitk8xx_t __iomem *sys_tmr1;
+        sit8xx_t __iomem *sys_tmr2;
         int time;
 
-        sys_tmr1 = (sitk8xx_t *) immr_map(im_sitk);
-        sys_tmr2 = (sit8xx_t *) immr_map(im_sit);
+        sys_tmr1 = immr_map(im_sitk);
+        sys_tmr2 = immr_map(im_sit);
         time = mktime(tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday,
                       tm->tm_hour, tm->tm_min, tm->tm_sec);
 
@@ -228,7 +197,7 @@ int mpc8xx_set_rtc_time(struct rtc_time *tm)
 void mpc8xx_get_rtc_time(struct rtc_time *tm)
 {
         unsigned long data;
-        sit8xx_t *sys_tmr = (sit8xx_t *) immr_map(im_sit);
+        sit8xx_t __iomem *sys_tmr = immr_map(im_sit);
 
         /* Get time from the RTC. */
         data = in_be32(&sys_tmr->sit_rtc);
@@ -241,8 +210,7 @@ void mpc8xx_get_rtc_time(struct rtc_time *tm)
 
 void mpc8xx_restart(char *cmd)
 {
-        __volatile__ unsigned char dummy;
-        car8xx_t * clk_r = (car8xx_t *) immr_map(im_clkrst);
+        car8xx_t __iomem *clk_r = immr_map(im_clkrst);
 
 
         local_irq_disable();
@@ -252,26 +220,8 @@ void mpc8xx_restart(char *cmd)
         */
         mtmsr(mfmsr() & ~0x1000);
 
-        dummy = in_8(&clk_r->res[0]);
-        printk("Restart failed\n");
-        while(1);
-}
-
-void mpc8xx_show_cpuinfo(struct seq_file *m)
-{
-        struct device_node *root;
-        uint memsize = total_memory;
-        const char *model = "";
-
-        seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
-
-        root = of_find_node_by_path("/");
-        if (root)
-                model = of_get_property(root, "model", NULL);
-        seq_printf(m, "Machine\t\t: %s\n", model);
-        of_node_put(root);
-
-        seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));
+        in_8(&clk_r->res[0]);
+        panic("Restart failed\n");
 }
 
 static void cpm_cascade(unsigned int irq, struct irq_desc *desc)
diff --git a/arch/powerpc/platforms/8xx/mpc86xads.h b/arch/powerpc/platforms/8xx/mpc86xads.h
index dd10cd20b6a7..cffa194ccf1f 100644
--- a/arch/powerpc/platforms/8xx/mpc86xads.h
+++ b/arch/powerpc/platforms/8xx/mpc86xads.h
@@ -29,9 +29,6 @@
 #define CFG_PHYDEV_ADDR         ((uint)0xff0a0000)
 #define BCSR5                   ((uint)(CFG_PHYDEV_ADDR + 0x300))
 
-#define IMAP_ADDR               (get_immrbase())
-#define IMAP_SIZE               ((uint)(64 * 1024))
-
 #define MPC8xx_CPM_OFFSET       (0x9c0)
 #define CPM_MAP_ADDR            (get_immrbase() + MPC8xx_CPM_OFFSET)
 #define CPM_IRQ_OFFSET          16     // for compability with cpm_uart driver
diff --git a/arch/powerpc/platforms/8xx/mpc86xads_setup.c b/arch/powerpc/platforms/8xx/mpc86xads_setup.c
index 8f64f48698ab..49012835f453 100644
--- a/arch/powerpc/platforms/8xx/mpc86xads_setup.c
+++ b/arch/powerpc/platforms/8xx/mpc86xads_setup.c
@@ -37,14 +37,7 @@
 #include <asm/fs_pd.h>
 #include <asm/prom.h>
 
-extern void cpm_reset(void);
-extern void mpc8xx_show_cpuinfo(struct seq_file*);
-extern void mpc8xx_restart(char *cmd);
-extern void mpc8xx_calibrate_decr(void);
-extern int mpc8xx_set_rtc_time(struct rtc_time *tm);
-extern void mpc8xx_get_rtc_time(struct rtc_time *tm);
-extern void m8xx_pic_init(void);
-extern unsigned int mpc8xx_get_irq(void);
+#include <sysdev/commproc.h>
 
 static void init_smc1_uart_ioports(struct fs_uart_platform_info* fpi);
 static void init_smc2_uart_ioports(struct fs_uart_platform_info* fpi);
@@ -277,7 +270,6 @@ define_machine(mpc86x_ads) {
         .probe                  = mpc86xads_probe,
         .setup_arch             = mpc86xads_setup_arch,
         .init_IRQ               = m8xx_pic_init,
-        .show_cpuinfo           = mpc8xx_show_cpuinfo,
         .get_irq                = mpc8xx_get_irq,
         .restart                = mpc8xx_restart,
         .calibrate_decr         = mpc8xx_calibrate_decr,
diff --git a/arch/powerpc/platforms/8xx/mpc885ads.h b/arch/powerpc/platforms/8xx/mpc885ads.h
index 14db12417064..a21e528f26c6 100644
--- a/arch/powerpc/platforms/8xx/mpc885ads.h
+++ b/arch/powerpc/platforms/8xx/mpc885ads.h
@@ -29,9 +29,6 @@
 #define CFG_PHYDEV_ADDR         ((uint)0xff0a0000)
 #define BCSR5                   ((uint)(CFG_PHYDEV_ADDR + 0x300))
 
-#define IMAP_ADDR               (get_immrbase())
-#define IMAP_SIZE               ((uint)(64 * 1024))
-
 #define MPC8xx_CPM_OFFSET       (0x9c0)
 #define CPM_MAP_ADDR            (get_immrbase() + MPC8xx_CPM_OFFSET)
 #define CPM_IRQ_OFFSET          16     // for compability with cpm_uart driver
diff --git a/arch/powerpc/platforms/8xx/mpc885ads_setup.c b/arch/powerpc/platforms/8xx/mpc885ads_setup.c
index a1dab4cfd3de..bad08683f7ae 100644
--- a/arch/powerpc/platforms/8xx/mpc885ads_setup.c
+++ b/arch/powerpc/platforms/8xx/mpc885ads_setup.c
@@ -38,14 +38,7 @@
 #include <asm/fs_pd.h>
 #include <asm/prom.h>
 
-extern void cpm_reset(void);
-extern void mpc8xx_show_cpuinfo(struct seq_file *);
-extern void mpc8xx_restart(char *cmd);
-extern void mpc8xx_calibrate_decr(void);
-extern int mpc8xx_set_rtc_time(struct rtc_time *tm);
-extern void mpc8xx_get_rtc_time(struct rtc_time *tm);
-extern void m8xx_pic_init(void);
-extern unsigned int mpc8xx_get_irq(void);
+#include <sysdev/commproc.h>
 
 static void init_smc1_uart_ioports(struct fs_uart_platform_info *fpi);
 static void init_smc2_uart_ioports(struct fs_uart_platform_info *fpi);
@@ -430,7 +423,6 @@ define_machine(mpc885_ads)
         .probe           = mpc885ads_probe,
         .setup_arch      = mpc885ads_setup_arch,
         .init_IRQ        = m8xx_pic_init,
-        .show_cpuinfo    = mpc8xx_show_cpuinfo,
         .get_irq         = mpc8xx_get_irq,
         .restart         = mpc8xx_restart,
         .calibrate_decr  = mpc8xx_calibrate_decr,
diff --git a/arch/powerpc/sysdev/commproc.c b/arch/powerpc/sysdev/commproc.c
index 160a8b49bdea..f8f3741acd87 100644
--- a/arch/powerpc/sysdev/commproc.c
+++ b/arch/powerpc/sysdev/commproc.c
@@ -47,8 +47,9 @@
 static void m8xx_cpm_dpinit(void);
 static uint host_buffer; /* One page of host buffer */
 static uint host_end;    /* end + 1 */
-cpm8xx_t *cpmp;          /* Pointer to comm processor space */
-cpic8xx_t *cpic_reg;
+cpm8xx_t __iomem *cpmp;  /* Pointer to comm processor space */
+immap_t __iomem *mpc8xx_immr;
+static cpic8xx_t __iomem *cpic_reg;
 
 static struct irq_host *cpm_pic_host;
 
@@ -133,16 +134,19 @@ unsigned int cpm_pic_init(void)
 
         pr_debug("cpm_pic_init\n");
 
-        np = of_find_compatible_node(NULL, "cpm-pic", "CPM");
+        np = of_find_compatible_node(NULL, NULL, "fsl,cpm1-pic");
+        if (np == NULL)
+                np = of_find_compatible_node(NULL, "cpm-pic", "CPM");
         if (np == NULL) {
                 printk(KERN_ERR "CPM PIC init: can not find cpm-pic node\n");
                 return sirq;
         }
+
         ret = of_address_to_resource(np, 0, &res);
         if (ret)
                 goto end;
 
-        cpic_reg = (void *)ioremap(res.start, res.end - res.start + 1);
+        cpic_reg = ioremap(res.start, res.end - res.start + 1);
         if (cpic_reg == NULL)
                 goto end;
 
@@ -165,14 +169,16 @@ unsigned int cpm_pic_init(void)
                 sirq = NO_IRQ;
                 goto end;
         }
-        of_node_put(np);
 
         /* Install our own error handler. */
-        np = of_find_node_by_type(NULL, "cpm");
+        np = of_find_compatible_node(NULL, NULL, "fsl,cpm1");
+        if (np == NULL)
+                np = of_find_node_by_type(NULL, "cpm");
         if (np == NULL) {
                 printk(KERN_ERR "CPM PIC init: can not find cpm node\n");
                 goto end;
         }
+
         eirq = irq_of_parse_and_map(np, 0);
         if (eirq == NO_IRQ)
                 goto end;
@@ -189,21 +195,28 @@ end:
 
 void cpm_reset(void)
 {
-        cpm8xx_t *commproc;
-        sysconf8xx_t *siu_conf;
+        sysconf8xx_t __iomem *siu_conf;
 
-        commproc = (cpm8xx_t *)ioremap(CPM_MAP_ADDR, CPM_MAP_SIZE);
+        mpc8xx_immr = ioremap(get_immrbase(), 0x4000);
+        if (!mpc8xx_immr) {
+                printk(KERN_CRIT "Could not map IMMR\n");
+                return;
+        }
 
-#ifdef CONFIG_UCODE_PATCH
+        cpmp = &mpc8xx_immr->im_cpm;
+
+#ifndef CONFIG_PPC_EARLY_DEBUG_CPM
         /* Perform a reset.
         */
-        out_be16(&commproc->cp_cpcr, CPM_CR_RST | CPM_CR_FLG);
+        out_be16(&cpmp->cp_cpcr, CPM_CR_RST | CPM_CR_FLG);
 
         /* Wait for it.
         */
-        while (in_be16(&commproc->cp_cpcr) & CPM_CR_FLG);
+        while (in_be16(&cpmp->cp_cpcr) & CPM_CR_FLG);
+#endif
 
-        cpm_load_patch(commproc);
+#ifdef CONFIG_UCODE_PATCH
+        cpm_load_patch(cpmp);
 #endif
 
         /* Set SDMA Bus Request priority 5.
@@ -212,16 +225,12 @@ void cpm_reset(void)
          * manual recommends it.
          * Bit 25, FAM can also be set to use FEC aggressive mode (860T).
          */
-        siu_conf = (sysconf8xx_t*)immr_map(im_siu_conf);
+        siu_conf = immr_map(im_siu_conf);
         out_be32(&siu_conf->sc_sdcr, 1);
         immr_unmap(siu_conf);
 
         /* Reclaim the DP memory for our use. */
         m8xx_cpm_dpinit();
-
-        /* Tell everyone where the comm processor resides.
-        */
-        cpmp = commproc;
 }
 
 /* We used to do this earlier, but have to postpone as long as possible
@@ -271,20 +280,20 @@ m8xx_cpm_hostalloc(uint size)
 void
 cpm_setbrg(uint brg, uint rate)
 {
-        volatile uint   *bp;
+        u32 __iomem *bp;
 
         /* This is good enough to get SMCs running.....
         */
-        bp = (uint *)&cpmp->cp_brgc1;
+        bp = &cpmp->cp_brgc1;
         bp += brg;
         /* The BRG has a 12-bit counter.  For really slow baud rates (or
          * really fast processors), we may have to further divide by 16.
          */
         if (((BRG_UART_CLK / rate) - 1) < 4096)
-                *bp = (((BRG_UART_CLK / rate) - 1) << 1) | CPM_BRG_EN;
+                out_be32(bp, (((BRG_UART_CLK / rate) - 1) << 1) | CPM_BRG_EN);
         else
-                *bp = (((BRG_UART_CLK_DIV16 / rate) - 1) << 1) |
-                                                CPM_BRG_EN | CPM_BRG_DIV16;
+                out_be32(bp, (((BRG_UART_CLK_DIV16 / rate) - 1) << 1) |
+                             CPM_BRG_EN | CPM_BRG_DIV16);
 }
 
 /*
@@ -299,15 +308,15 @@ static rh_block_t cpm_boot_dpmem_rh_block[16];
 static rh_info_t cpm_dpmem_info;
 
 #define CPM_DPMEM_ALIGNMENT     8
-static u8 *dpram_vbase;
-static uint dpram_pbase;
+static u8 __iomem *dpram_vbase;
+static phys_addr_t dpram_pbase;
 
-void m8xx_cpm_dpinit(void)
+static void m8xx_cpm_dpinit(void)
 {
         spin_lock_init(&cpm_dpmem_lock);
 
-        dpram_vbase = immr_map_size(im_cpm.cp_dpmem, CPM_DATAONLY_BASE + CPM_DATAONLY_SIZE);
-        dpram_pbase = (uint)&((immap_t *)IMAP_ADDR)->im_cpm.cp_dpmem;
+        dpram_vbase = cpmp->cp_dpmem;
+        dpram_pbase = get_immrbase() + offsetof(immap_t, im_cpm.cp_dpmem);
 
         /* Initialize the info header */
         rh_init(&cpm_dpmem_info, CPM_DPMEM_ALIGNMENT,
@@ -383,7 +392,7 @@ void *cpm_dpram_addr(unsigned long offset)
 }
 EXPORT_SYMBOL(cpm_dpram_addr);
 
-uint cpm_dpram_phys(u8* addr)
+uint cpm_dpram_phys(u8 *addr)
 {
         return (dpram_pbase + (uint)(addr - dpram_vbase));
 }
diff --git a/arch/powerpc/sysdev/commproc.h b/arch/powerpc/sysdev/commproc.h
new file mode 100644
index 000000000000..9155ba467274
--- /dev/null
+++ b/arch/powerpc/sysdev/commproc.h
@@ -0,0 +1,12 @@
+#ifndef _POWERPC_SYSDEV_COMMPROC_H
+#define _POWERPC_SYSDEV_COMMPROC_H
+
+extern void cpm_reset(void);
+extern void mpc8xx_restart(char *cmd);
+extern void mpc8xx_calibrate_decr(void);
+extern int mpc8xx_set_rtc_time(struct rtc_time *tm);
+extern void mpc8xx_get_rtc_time(struct rtc_time *tm);
+extern void m8xx_pic_init(void);
+extern unsigned int mpc8xx_get_irq(void);
+
+#endif
diff --git a/arch/powerpc/sysdev/mpc8xx_pic.c b/arch/powerpc/sysdev/mpc8xx_pic.c
index 565156ae65bc..7aa4ff5f5ec8 100644
--- a/arch/powerpc/sysdev/mpc8xx_pic.c
+++ b/arch/powerpc/sysdev/mpc8xx_pic.c
@@ -22,7 +22,7 @@ extern int cpm_get_irq(struct pt_regs *regs);
 static struct irq_host *mpc8xx_pic_host;
 #define NR_MASK_WORDS   ((NR_IRQS + 31) / 32)
 static unsigned long ppc_cached_irq_mask[NR_MASK_WORDS];
-static sysconf8xx_t     *siu_reg;
+static sysconf8xx_t __iomem *siu_reg;
 
 int cpm_get_irq(struct pt_regs *regs);
 
@@ -159,13 +159,14 @@ static struct irq_host_ops mpc8xx_pic_host_ops = {
 int mpc8xx_pic_init(void)
 {
         struct resource res;
-        struct device_node *np = NULL;
+        struct device_node *np;
         int ret;
 
-        np = of_find_node_by_type(np, "mpc8xx-pic");
-
+        np = of_find_compatible_node(NULL, NULL, "fsl,pq1-pic");
+        if (np == NULL)
+                np = of_find_node_by_type(NULL, "mpc8xx-pic");
         if (np == NULL) {
-                printk(KERN_ERR "Could not find open-pic node\n");
+                printk(KERN_ERR "Could not find fsl,pq1-pic node\n");
                 return -ENOMEM;
         }
 
@@ -173,11 +174,9 @@ int mpc8xx_pic_init(void)
         if (ret)
                 goto out;
 
-        siu_reg = (void *)ioremap(res.start, res.end - res.start + 1);
-        if (siu_reg == NULL) {
-                ret = -EINVAL;
-                goto out;
-        }
+        siu_reg = ioremap(res.start, res.end - res.start + 1);
+        if (siu_reg == NULL)
+                return -EINVAL;
 
         mpc8xx_pic_host = irq_alloc_host(of_node_get(np), IRQ_HOST_MAP_LINEAR,
                                          64, &mpc8xx_pic_host_ops, 64);