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author | Paul Mackerras <paulus@samba.org> | 2007-10-23 08:45:23 +1000 |
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committer | Paul Mackerras <paulus@samba.org> | 2007-10-23 08:45:23 +1000 |
commit | 3cfa8f6c542467bd046aedb9d2e394b3d0e8467f (patch) | |
tree | fe8e6c5e4ad1bfb51bc1896b6dd8f616f266eb76 /arch | |
parent | 55b70a0300b873c0ec7ea6e33752af56f41250ce (diff) | |
parent | 9dda78b711ca4d507251a7e896b2f41ec019fc58 (diff) | |
download | kernel_samsung_smdk4412-3cfa8f6c542467bd046aedb9d2e394b3d0e8467f.zip kernel_samsung_smdk4412-3cfa8f6c542467bd046aedb9d2e394b3d0e8467f.tar.gz kernel_samsung_smdk4412-3cfa8f6c542467bd046aedb9d2e394b3d0e8467f.tar.bz2 |
Merge branch 'for-2.6.24' of git://git.secretlab.ca/git/linux-2.6-mpc52xx
Diffstat (limited to 'arch')
-rw-r--r-- | arch/powerpc/boot/dts/lite5200.dts | 26 | ||||
-rw-r--r-- | arch/powerpc/boot/dts/lite5200b.dts | 26 | ||||
-rw-r--r-- | arch/powerpc/platforms/52xx/lite5200.c | 4 | ||||
-rw-r--r-- | arch/powerpc/platforms/52xx/mpc52xx_common.c | 71 | ||||
-rw-r--r-- | arch/powerpc/sysdev/bestcomm/bestcomm.c | 9 |
5 files changed, 95 insertions, 41 deletions
diff --git a/arch/powerpc/boot/dts/lite5200.dts b/arch/powerpc/boot/dts/lite5200.dts index bc45f5f..6731763 100644 --- a/arch/powerpc/boot/dts/lite5200.dts +++ b/arch/powerpc/boot/dts/lite5200.dts @@ -70,18 +70,16 @@ }; gpt@600 { // General Purpose Timer - compatible = "mpc5200-gpt"; - device_type = "gpt"; + compatible = "fsl,mpc5200-gpt"; cell-index = <0>; reg = <600 10>; interrupts = <1 9 0>; interrupt-parent = <&mpc5200_pic>; - has-wdt; + fsl,has-wdt; }; gpt@610 { // General Purpose Timer - compatible = "mpc5200-gpt"; - device_type = "gpt"; + compatible = "fsl,mpc5200-gpt"; cell-index = <1>; reg = <610 10>; interrupts = <1 a 0>; @@ -89,8 +87,7 @@ }; gpt@620 { // General Purpose Timer - compatible = "mpc5200-gpt"; - device_type = "gpt"; + compatible = "fsl,mpc5200-gpt"; cell-index = <2>; reg = <620 10>; interrupts = <1 b 0>; @@ -98,8 +95,7 @@ }; gpt@630 { // General Purpose Timer - compatible = "mpc5200-gpt"; - device_type = "gpt"; + compatible = "fsl,mpc5200-gpt"; cell-index = <3>; reg = <630 10>; interrupts = <1 c 0>; @@ -107,8 +103,7 @@ }; gpt@640 { // General Purpose Timer - compatible = "mpc5200-gpt"; - device_type = "gpt"; + compatible = "fsl,mpc5200-gpt"; cell-index = <4>; reg = <640 10>; interrupts = <1 d 0>; @@ -116,8 +111,7 @@ }; gpt@650 { // General Purpose Timer - compatible = "mpc5200-gpt"; - device_type = "gpt"; + compatible = "fsl,mpc5200-gpt"; cell-index = <5>; reg = <650 10>; interrupts = <1 e 0>; @@ -125,8 +119,7 @@ }; gpt@660 { // General Purpose Timer - compatible = "mpc5200-gpt"; - device_type = "gpt"; + compatible = "fsl,mpc5200-gpt"; cell-index = <6>; reg = <660 10>; interrupts = <1 f 0>; @@ -134,8 +127,7 @@ }; gpt@670 { // General Purpose Timer - compatible = "mpc5200-gpt"; - device_type = "gpt"; + compatible = "fsl,mpc5200-gpt"; cell-index = <7>; reg = <670 10>; interrupts = <1 10 0>; diff --git a/arch/powerpc/boot/dts/lite5200b.dts b/arch/powerpc/boot/dts/lite5200b.dts index 6582c9a..b540388 100644 --- a/arch/powerpc/boot/dts/lite5200b.dts +++ b/arch/powerpc/boot/dts/lite5200b.dts @@ -70,18 +70,16 @@ }; gpt@600 { // General Purpose Timer - compatible = "mpc5200b-gpt","mpc5200-gpt"; - device_type = "gpt"; + compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt"; cell-index = <0>; reg = <600 10>; interrupts = <1 9 0>; interrupt-parent = <&mpc5200_pic>; - has-wdt; + fsl,has-wdt; }; gpt@610 { // General Purpose Timer - compatible = "mpc5200b-gpt","mpc5200-gpt"; - device_type = "gpt"; + compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt"; cell-index = <1>; reg = <610 10>; interrupts = <1 a 0>; @@ -89,8 +87,7 @@ }; gpt@620 { // General Purpose Timer - compatible = "mpc5200b-gpt","mpc5200-gpt"; - device_type = "gpt"; + compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt"; cell-index = <2>; reg = <620 10>; interrupts = <1 b 0>; @@ -98,8 +95,7 @@ }; gpt@630 { // General Purpose Timer - compatible = "mpc5200b-gpt","mpc5200-gpt"; - device_type = "gpt"; + compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt"; cell-index = <3>; reg = <630 10>; interrupts = <1 c 0>; @@ -107,8 +103,7 @@ }; gpt@640 { // General Purpose Timer - compatible = "mpc5200b-gpt","mpc5200-gpt"; - device_type = "gpt"; + compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt"; cell-index = <4>; reg = <640 10>; interrupts = <1 d 0>; @@ -116,8 +111,7 @@ }; gpt@650 { // General Purpose Timer - compatible = "mpc5200b-gpt","mpc5200-gpt"; - device_type = "gpt"; + compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt"; cell-index = <5>; reg = <650 10>; interrupts = <1 e 0>; @@ -125,8 +119,7 @@ }; gpt@660 { // General Purpose Timer - compatible = "mpc5200b-gpt","mpc5200-gpt"; - device_type = "gpt"; + compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt"; cell-index = <6>; reg = <660 10>; interrupts = <1 f 0>; @@ -134,8 +127,7 @@ }; gpt@670 { // General Purpose Timer - compatible = "mpc5200b-gpt","mpc5200-gpt"; - device_type = "gpt"; + compatible = "fsl,mpc5200b-gpt","fsl,mpc5200-gpt"; cell-index = <7>; reg = <670 10>; interrupts = <1 10 0>; diff --git a/arch/powerpc/platforms/52xx/lite5200.c b/arch/powerpc/platforms/52xx/lite5200.c index 65b7ae4..25d2bfa 100644 --- a/arch/powerpc/platforms/52xx/lite5200.c +++ b/arch/powerpc/platforms/52xx/lite5200.c @@ -145,6 +145,9 @@ static void __init lite5200_setup_arch(void) /* Some mpc5200 & mpc5200b related configuration */ mpc5200_setup_xlb_arbiter(); + /* Map wdt for mpc52xx_restart() */ + mpc52xx_map_wdt(); + #ifdef CONFIG_PM mpc52xx_suspend.board_suspend_prepare = lite5200_suspend_prepare; mpc52xx_suspend.board_resume_finish = lite5200_resume_finish; @@ -183,5 +186,6 @@ define_machine(lite5200) { .init = mpc52xx_declare_of_platform_devices, .init_IRQ = mpc52xx_init_irq, .get_irq = mpc52xx_get_irq, + .restart = mpc52xx_restart, .calibrate_decr = generic_calibrate_decr, }; diff --git a/arch/powerpc/platforms/52xx/mpc52xx_common.c b/arch/powerpc/platforms/52xx/mpc52xx_common.c index 3bc201e..9850685 100644 --- a/arch/powerpc/platforms/52xx/mpc52xx_common.c +++ b/arch/powerpc/platforms/52xx/mpc52xx_common.c @@ -18,15 +18,20 @@ #include <asm/prom.h> #include <asm/mpc52xx.h> +/* + * This variable is mapped in mpc52xx_map_wdt() and used in mpc52xx_restart(). + * Permanent mapping is required because mpc52xx_restart() can be called + * from interrupt context while node mapping (which calls ioremap()) + * cannot be used at such point. + */ +static volatile struct mpc52xx_gpt *mpc52xx_wdt = NULL; -void __iomem * -mpc52xx_find_and_map(const char *compatible) +static void __iomem * +mpc52xx_map_node(struct device_node *ofn) { - struct device_node *ofn; const u32 *regaddr_p; u64 regaddr64, size64; - ofn = of_find_compatible_node(NULL, NULL, compatible); if (!ofn) return NULL; @@ -42,8 +47,23 @@ mpc52xx_find_and_map(const char *compatible) return ioremap((u32)regaddr64, (u32)size64); } + +void __iomem * +mpc52xx_find_and_map(const char *compatible) +{ + return mpc52xx_map_node( + of_find_compatible_node(NULL, NULL, compatible)); +} + EXPORT_SYMBOL(mpc52xx_find_and_map); +void __iomem * +mpc52xx_find_and_map_path(const char *path) +{ + return mpc52xx_map_node(of_find_node_by_path(path)); +} + +EXPORT_SYMBOL(mpc52xx_find_and_map_path); /** * mpc52xx_find_ipb_freq - Find the IPB bus frequency for a device @@ -113,3 +133,46 @@ mpc52xx_declare_of_platform_devices(void) "Error while probing of_platform bus\n"); } +void __init +mpc52xx_map_wdt(void) +{ + const void *has_wdt; + struct device_node *np; + + /* mpc52xx_wdt is mapped here and used in mpc52xx_restart, + * possibly from a interrupt context. wdt is only implement + * on a gpt0, so check has-wdt property before mapping. + */ + for_each_compatible_node(np, NULL, "fsl,mpc5200-gpt") { + has_wdt = of_get_property(np, "fsl,has-wdt", NULL); + if (has_wdt) { + mpc52xx_wdt = mpc52xx_map_node(np); + return; + } + } + for_each_compatible_node(np, NULL, "mpc5200-gpt") { + has_wdt = of_get_property(np, "has-wdt", NULL); + if (has_wdt) { + mpc52xx_wdt = mpc52xx_map_node(np); + return; + } + } +} + +void +mpc52xx_restart(char *cmd) +{ + local_irq_disable(); + + /* Turn on the watchdog and wait for it to expire. + * It effectively does a reset. */ + if (mpc52xx_wdt) { + out_be32(&mpc52xx_wdt->mode, 0x00000000); + out_be32(&mpc52xx_wdt->count, 0x000000ff); + out_be32(&mpc52xx_wdt->mode, 0x00009004); + } else + printk("mpc52xx_restart: Can't access wdt. " + "Restart impossible, system halted.\n"); + + while (1); +} diff --git a/arch/powerpc/sysdev/bestcomm/bestcomm.c b/arch/powerpc/sysdev/bestcomm/bestcomm.c index 48492a8..740ad73 100644 --- a/arch/powerpc/sysdev/bestcomm/bestcomm.c +++ b/arch/powerpc/sysdev/bestcomm/bestcomm.c @@ -269,6 +269,7 @@ bcom_engine_init(void) int task; phys_addr_t tdt_pa, ctx_pa, var_pa, fdt_pa; unsigned int tdt_size, ctx_size, var_size, fdt_size; + u16 regval; /* Allocate & clear SRAM zones for FDT, TDTs, contexts and vars/incs */ tdt_size = BCOM_MAX_TASKS * sizeof(struct bcom_tdt); @@ -319,9 +320,11 @@ bcom_engine_init(void) /* Init 'always' initiator */ out_8(&bcom_eng->regs->ipr[BCOM_INITIATOR_ALWAYS], BCOM_IPR_ALWAYS); - /* Disable COMM Bus Prefetch, apparently it's not reliable yet */ - /* FIXME: This should be done on 5200 and not 5200B ... */ - out_be16(&bcom_eng->regs->PtdCntrl, in_be16(&bcom_eng->regs->PtdCntrl) | 1); + /* Disable COMM Bus Prefetch on the original 5200; it's broken */ + if ((mfspr(SPRN_SVR) & MPC5200_SVR_MASK) == MPC5200_SVR) { + regval = in_be16(&bcom_eng->regs->PtdCntrl); + out_be16(&bcom_eng->regs->PtdCntrl, regval | 1); + } /* Init lock */ spin_lock_init(&bcom_eng->lock); |