diff options
| -rw-r--r-- | arch/powerpc/sysdev/dcr.c | 154 | ||||
| -rw-r--r-- | include/asm-powerpc/dcr-generic.h | 49 | ||||
| -rw-r--r-- | include/asm-powerpc/dcr-mmio.h | 20 | ||||
| -rw-r--r-- | include/asm-powerpc/dcr-native.h | 16 | ||||
| -rw-r--r-- | include/asm-powerpc/dcr.h | 39 |
5 files changed, 231 insertions, 47 deletions
diff --git a/arch/powerpc/sysdev/dcr.c b/arch/powerpc/sysdev/dcr.c index 437e48d3ae33..5f39a79b0660 100644 --- a/arch/powerpc/sysdev/dcr.c +++ b/arch/powerpc/sysdev/dcr.c @@ -23,6 +23,105 @@ #include <asm/prom.h> #include <asm/dcr.h> +static struct device_node *find_dcr_parent(struct device_node *node) +{ + struct device_node *par, *tmp; + const u32 *p; + + for (par = of_node_get(node); par;) { + if (of_get_property(par, "dcr-controller", NULL)) + break; + p = of_get_property(par, "dcr-parent", NULL); + tmp = par; + if (p == NULL) + par = of_get_parent(par); + else + par = of_find_node_by_phandle(*p); + of_node_put(tmp); + } + return par; +} + +#if defined(CONFIG_PPC_DCR_NATIVE) && defined(CONFIG_PPC_DCR_MMIO) + +bool dcr_map_ok_generic(dcr_host_t host) +{ + if (host.type == DCR_HOST_NATIVE) + return dcr_map_ok_native(host.host.native); + else if (host.type == DCR_HOST_MMIO) + return dcr_map_ok_mmio(host.host.mmio); + else + return 0; +} +EXPORT_SYMBOL_GPL(dcr_map_ok_generic); + +dcr_host_t dcr_map_generic(struct device_node *dev, + unsigned int dcr_n, + unsigned int dcr_c) +{ + dcr_host_t host; + struct device_node *dp; + const char *prop; + + host.type = DCR_HOST_INVALID; + + dp = find_dcr_parent(dev); + if (dp == NULL) + return host; + + prop = of_get_property(dp, "dcr-access-method", NULL); + + pr_debug("dcr_map_generic(dcr-access-method = %s)\n", prop); + + if (!strcmp(prop, "native")) { + host.type = DCR_HOST_NATIVE; + host.host.native = dcr_map_native(dev, dcr_n, dcr_c); + } else if (!strcmp(prop, "mmio")) { + host.type = DCR_HOST_MMIO; + host.host.mmio = dcr_map_mmio(dev, dcr_n, dcr_c); + } + + of_node_put(dp); + return host; +} +EXPORT_SYMBOL_GPL(dcr_map_generic); + +void dcr_unmap_generic(dcr_host_t host, unsigned int dcr_c) +{ + if (host.type == DCR_HOST_NATIVE) + dcr_unmap_native(host.host.native, dcr_c); + else if (host.type == DCR_HOST_MMIO) + dcr_unmap_mmio(host.host.mmio, dcr_c); + else /* host.type == DCR_HOST_INVALID */ + WARN_ON(true); +} +EXPORT_SYMBOL_GPL(dcr_unmap_generic); + +u32 dcr_read_generic(dcr_host_t host, unsigned int dcr_n) +{ + if (host.type == DCR_HOST_NATIVE) + return dcr_read_native(host.host.native, dcr_n); + else if (host.type == DCR_HOST_MMIO) + return dcr_read_mmio(host.host.mmio, dcr_n); + else /* host.type == DCR_HOST_INVALID */ + WARN_ON(true); + return 0; +} +EXPORT_SYMBOL_GPL(dcr_read_generic); + +void dcr_write_generic(dcr_host_t host, unsigned int dcr_n, u32 value) +{ + if (host.type == DCR_HOST_NATIVE) + dcr_write_native(host.host.native, dcr_n, value); + else if (host.type == DCR_HOST_MMIO) + dcr_write_mmio(host.host.mmio, dcr_n, value); + else /* host.type == DCR_HOST_INVALID */ + WARN_ON(true); +} +EXPORT_SYMBOL_GPL(dcr_write_generic); + +#endif /* defined(CONFIG_PPC_DCR_NATIVE) && defined(CONFIG_PPC_DCR_MMIO) */ + unsigned int dcr_resource_start(struct device_node *np, unsigned int index) { unsigned int ds; @@ -47,26 +146,7 @@ unsigned int dcr_resource_len(struct device_node *np, unsigned int index) } EXPORT_SYMBOL_GPL(dcr_resource_len); -#ifndef CONFIG_PPC_DCR_NATIVE - -static struct device_node * find_dcr_parent(struct device_node * node) -{ - struct device_node *par, *tmp; - const u32 *p; - - for (par = of_node_get(node); par;) { - if (of_get_property(par, "dcr-controller", NULL)) - break; - p = of_get_property(par, "dcr-parent", NULL); - tmp = par; - if (p == NULL) - par = of_get_parent(par); - else - par = of_find_node_by_phandle(*p); - of_node_put(tmp); - } - return par; -} +#ifdef CONFIG_PPC_DCR_MMIO u64 of_translate_dcr_address(struct device_node *dev, unsigned int dcr_n, @@ -75,7 +155,7 @@ u64 of_translate_dcr_address(struct device_node *dev, struct device_node *dp; const u32 *p; unsigned int stride; - u64 ret; + u64 ret = OF_BAD_ADDR; dp = find_dcr_parent(dev); if (dp == NULL) @@ -90,7 +170,7 @@ u64 of_translate_dcr_address(struct device_node *dev, if (p == NULL) p = of_get_property(dp, "dcr-mmio-space", NULL); if (p == NULL) - return OF_BAD_ADDR; + goto done; /* Maybe could do some better range checking here */ ret = of_translate_address(dp, p); @@ -98,21 +178,25 @@ u64 of_translate_dcr_address(struct device_node *dev, ret += (u64)(stride) * (u64)dcr_n; if (out_stride) *out_stride = stride; + + done: + of_node_put(dp); return ret; } -dcr_host_t dcr_map(struct device_node *dev, unsigned int dcr_n, - unsigned int dcr_c) +dcr_host_mmio_t dcr_map_mmio(struct device_node *dev, + unsigned int dcr_n, + unsigned int dcr_c) { - dcr_host_t ret = { .token = NULL, .stride = 0, .base = dcr_n }; + dcr_host_mmio_t ret = { .token = NULL, .stride = 0, .base = dcr_n }; u64 addr; pr_debug("dcr_map(%s, 0x%x, 0x%x)\n", dev->full_name, dcr_n, dcr_c); addr = of_translate_dcr_address(dev, dcr_n, &ret.stride); - pr_debug("translates to addr: 0x%lx, stride: 0x%x\n", - addr, ret.stride); + pr_debug("translates to addr: 0x%llx, stride: 0x%x\n", + (unsigned long long) addr, ret.stride); if (addr == OF_BAD_ADDR) return ret; pr_debug("mapping 0x%x bytes\n", dcr_c * ret.stride); @@ -124,11 +208,11 @@ dcr_host_t dcr_map(struct device_node *dev, unsigned int dcr_n, ret.token -= dcr_n * ret.stride; return ret; } -EXPORT_SYMBOL_GPL(dcr_map); +EXPORT_SYMBOL_GPL(dcr_map_mmio); -void dcr_unmap(dcr_host_t host, unsigned int dcr_c) +void dcr_unmap_mmio(dcr_host_mmio_t host, unsigned int dcr_c) { - dcr_host_t h = host; + dcr_host_mmio_t h = host; if (h.token == NULL) return; @@ -136,7 +220,11 @@ void dcr_unmap(dcr_host_t host, unsigned int dcr_c) iounmap(h.token); h.token = NULL; } -EXPORT_SYMBOL_GPL(dcr_unmap); -#else /* defined(CONFIG_PPC_DCR_NATIVE) */ +EXPORT_SYMBOL_GPL(dcr_unmap_mmio); + +#endif /* defined(CONFIG_PPC_DCR_MMIO) */ + +#ifdef CONFIG_PPC_DCR_NATIVE DEFINE_SPINLOCK(dcr_ind_lock); -#endif /* !defined(CONFIG_PPC_DCR_NATIVE) */ +#endif /* defined(CONFIG_PPC_DCR_NATIVE) */ + diff --git a/include/asm-powerpc/dcr-generic.h b/include/asm-powerpc/dcr-generic.h new file mode 100644 index 000000000000..35b71599ec46 --- /dev/null +++ b/include/asm-powerpc/dcr-generic.h @@ -0,0 +1,49 @@ +/* + * (c) Copyright 2006 Benjamin Herrenschmidt, IBM Corp. + * <benh@kernel.crashing.org> + * + * 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 + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See + * the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef _ASM_POWERPC_DCR_GENERIC_H +#define _ASM_POWERPC_DCR_GENERIC_H +#ifdef __KERNEL__ +#ifndef __ASSEMBLY__ + +enum host_type_t {DCR_HOST_MMIO, DCR_HOST_NATIVE, DCR_HOST_INVALID}; + +typedef struct { + enum host_type_t type; + union { + dcr_host_mmio_t mmio; + dcr_host_native_t native; + } host; +} dcr_host_t; + +extern bool dcr_map_ok_generic(dcr_host_t host); + +extern dcr_host_t dcr_map_generic(struct device_node *dev, unsigned int dcr_n, + unsigned int dcr_c); +extern void dcr_unmap_generic(dcr_host_t host, unsigned int dcr_c); + +extern u32 dcr_read_generic(dcr_host_t host, unsigned int dcr_n); + +extern void dcr_write_generic(dcr_host_t host, unsigned int dcr_n, u32 value); + +#endif /* __ASSEMBLY__ */ +#endif /* __KERNEL__ */ +#endif /* _ASM_POWERPC_DCR_GENERIC_H */ + + diff --git a/include/asm-powerpc/dcr-mmio.h b/include/asm-powerpc/dcr-mmio.h index 08532ff1899c..acd491dbd45a 100644 --- a/include/asm-powerpc/dcr-mmio.h +++ b/include/asm-powerpc/dcr-mmio.h @@ -27,20 +27,26 @@ typedef struct { void __iomem *token; unsigned int stride; unsigned int base; -} dcr_host_t; +} dcr_host_mmio_t; -#define DCR_MAP_OK(host) ((host).token != NULL) +static inline bool dcr_map_ok_mmio(dcr_host_mmio_t host) +{ + return host.token != NULL; +} -extern dcr_host_t dcr_map(struct device_node *dev, unsigned int dcr_n, - unsigned int dcr_c); -extern void dcr_unmap(dcr_host_t host, unsigned int dcr_c); +extern dcr_host_mmio_t dcr_map_mmio(struct device_node *dev, + unsigned int dcr_n, + unsigned int dcr_c); +extern void dcr_unmap_mmio(dcr_host_mmio_t host, unsigned int dcr_c); -static inline u32 dcr_read(dcr_host_t host, unsigned int dcr_n) +static inline u32 dcr_read_mmio(dcr_host_mmio_t host, unsigned int dcr_n) { return in_be32(host.token + ((host.base + dcr_n) * host.stride)); } -static inline void dcr_write(dcr_host_t host, unsigned int dcr_n, u32 value) +static inline void dcr_write_mmio(dcr_host_mmio_t host, + unsigned int dcr_n, + u32 value) { out_be32(host.token + ((host.base + dcr_n) * host.stride), value); } diff --git a/include/asm-powerpc/dcr-native.h b/include/asm-powerpc/dcr-native.h index f8398ce80372..72d2b72c7390 100644 --- a/include/asm-powerpc/dcr-native.h +++ b/include/asm-powerpc/dcr-native.h @@ -26,14 +26,18 @@ typedef struct { unsigned int base; -} dcr_host_t; +} dcr_host_native_t; -#define DCR_MAP_OK(host) (1) +static inline bool dcr_map_ok_native(dcr_host_native_t host) +{ + return 1; +} -#define dcr_map(dev, dcr_n, dcr_c) ((dcr_host_t){ .base = (dcr_n) }) -#define dcr_unmap(host, dcr_c) do {} while (0) -#define dcr_read(host, dcr_n) mfdcr(dcr_n + host.base) -#define dcr_write(host, dcr_n, value) mtdcr(dcr_n + host.base, value) +#define dcr_map_native(dev, dcr_n, dcr_c) \ + ((dcr_host_native_t){ .base = (dcr_n) }) +#define dcr_unmap_native(host, dcr_c) do {} while (0) +#define dcr_read_native(host, dcr_n) mfdcr(dcr_n + host.base) +#define dcr_write_native(host, dcr_n, value) mtdcr(dcr_n + host.base, value) /* Device Control Registers */ void __mtdcr(int reg, unsigned int val); diff --git a/include/asm-powerpc/dcr.h b/include/asm-powerpc/dcr.h index 9338d50538f1..53b283050ab3 100644 --- a/include/asm-powerpc/dcr.h +++ b/include/asm-powerpc/dcr.h @@ -20,14 +20,50 @@ #ifndef _ASM_POWERPC_DCR_H #define _ASM_POWERPC_DCR_H #ifdef __KERNEL__ +#ifndef __ASSEMBLY__ #ifdef CONFIG_PPC_DCR #ifdef CONFIG_PPC_DCR_NATIVE #include <asm/dcr-native.h> -#else +#endif + +#ifdef CONFIG_PPC_DCR_MMIO #include <asm/dcr-mmio.h> #endif + +/* Indirection layer for providing both NATIVE and MMIO support. */ + +#if defined(CONFIG_PPC_DCR_NATIVE) && defined(CONFIG_PPC_DCR_MMIO) + +#include <asm/dcr-generic.h> + +#define DCR_MAP_OK(host) dcr_map_ok_generic(host) +#define dcr_map(dev, dcr_n, dcr_c) dcr_map_generic(dev, dcr_n, dcr_c) +#define dcr_unmap(host, dcr_c) dcr_unmap_generic(host, dcr_c) +#define dcr_read(host, dcr_n) dcr_read_generic(host, dcr_n) +#define dcr_write(host, dcr_n, value) dcr_write_generic(host, dcr_n, value) + +#else + +#ifdef CONFIG_PPC_DCR_NATIVE +typedef dcr_host_native_t dcr_host_t; +#define DCR_MAP_OK(host) dcr_map_ok_native(host) +#define dcr_map(dev, dcr_n, dcr_c) dcr_map_native(dev, dcr_n, dcr_c) +#define dcr_unmap(host, dcr_c) dcr_unmap_native(host, dcr_c) +#define dcr_read(host, dcr_n) dcr_read_native(host, dcr_n) +#define dcr_write(host, dcr_n, value) dcr_write_native(host, dcr_n, value) +#else +typedef dcr_host_mmio_t dcr_host_t; +#define DCR_MAP_OK(host) dcr_map_ok_mmio(host) +#define dcr_map(dev, dcr_n, dcr_c) dcr_map_mmio(dev, dcr_n, dcr_c) +#define dcr_unmap(host, dcr_c) dcr_unmap_mmio(host, dcr_c) +#define dcr_read(host, dcr_n) dcr_read_mmio(host, dcr_n) +#define dcr_write(host, dcr_n, value) dcr_write_mmio(host, dcr_n, value) +#endif + +#endif /* defined(CONFIG_PPC_DCR_NATIVE) && defined(CONFIG_PPC_DCR_MMIO) */ + /* * On CONFIG_PPC_MERGE, we have additional helpers to read the DCR * base from the device-tree @@ -41,5 +77,6 @@ extern unsigned int dcr_resource_len(struct device_node *np, #endif /* CONFIG_PPC_MERGE */ #endif /* CONFIG_PPC_DCR */ +#endif /* __ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_DCR_H */ |