diff options
Diffstat (limited to 'drivers/ssb/host_soc.c')
| -rw-r--r-- | drivers/ssb/host_soc.c | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/drivers/ssb/host_soc.c b/drivers/ssb/host_soc.c new file mode 100644 index 000000000..3b4384805 --- /dev/null +++ b/drivers/ssb/host_soc.c @@ -0,0 +1,210 @@ +/* + * Sonics Silicon Backplane SoC host related functions. + * Subsystem core + * + * Copyright 2005, Broadcom Corporation + * Copyright 2006, 2007, Michael Buesch <m@bues.ch> + * + * Licensed under the GNU/GPL. See COPYING for details. + */ + +#include "ssb_private.h" + +#include <linux/bcm47xx_nvram.h> +#include <linux/ssb/ssb.h> + +static u8 ssb_host_soc_read8(struct ssb_device *dev, u16 offset) +{ + struct ssb_bus *bus = dev->bus; + + offset += dev->core_index * SSB_CORE_SIZE; + return readb(bus->mmio + offset); +} + +static u16 ssb_host_soc_read16(struct ssb_device *dev, u16 offset) +{ + struct ssb_bus *bus = dev->bus; + + offset += dev->core_index * SSB_CORE_SIZE; + return readw(bus->mmio + offset); +} + +static u32 ssb_host_soc_read32(struct ssb_device *dev, u16 offset) +{ + struct ssb_bus *bus = dev->bus; + + offset += dev->core_index * SSB_CORE_SIZE; + return readl(bus->mmio + offset); +} + +#ifdef CONFIG_SSB_BLOCKIO +static void ssb_host_soc_block_read(struct ssb_device *dev, void *buffer, + size_t count, u16 offset, u8 reg_width) +{ + struct ssb_bus *bus = dev->bus; + void __iomem *addr; + + offset += dev->core_index * SSB_CORE_SIZE; + addr = bus->mmio + offset; + + switch (reg_width) { + case sizeof(u8): { + u8 *buf = buffer; + + while (count) { + *buf = __raw_readb(addr); + buf++; + count--; + } + break; + } + case sizeof(u16): { + __le16 *buf = buffer; + + WARN_ON(count & 1); + while (count) { + *buf = (__force __le16)__raw_readw(addr); + buf++; + count -= 2; + } + break; + } + case sizeof(u32): { + __le32 *buf = buffer; + + WARN_ON(count & 3); + while (count) { + *buf = (__force __le32)__raw_readl(addr); + buf++; + count -= 4; + } + break; + } + default: + WARN_ON(1); + } +} +#endif /* CONFIG_SSB_BLOCKIO */ + +static void ssb_host_soc_write8(struct ssb_device *dev, u16 offset, u8 value) +{ + struct ssb_bus *bus = dev->bus; + + offset += dev->core_index * SSB_CORE_SIZE; + writeb(value, bus->mmio + offset); +} + +static void ssb_host_soc_write16(struct ssb_device *dev, u16 offset, u16 value) +{ + struct ssb_bus *bus = dev->bus; + + offset += dev->core_index * SSB_CORE_SIZE; + writew(value, bus->mmio + offset); +} + +static void ssb_host_soc_write32(struct ssb_device *dev, u16 offset, u32 value) +{ + struct ssb_bus *bus = dev->bus; + + offset += dev->core_index * SSB_CORE_SIZE; + writel(value, bus->mmio + offset); +} + +#ifdef CONFIG_SSB_BLOCKIO +static void ssb_host_soc_block_write(struct ssb_device *dev, const void *buffer, + size_t count, u16 offset, u8 reg_width) +{ + struct ssb_bus *bus = dev->bus; + void __iomem *addr; + + offset += dev->core_index * SSB_CORE_SIZE; + addr = bus->mmio + offset; + + switch (reg_width) { + case sizeof(u8): { + const u8 *buf = buffer; + + while (count) { + __raw_writeb(*buf, addr); + buf++; + count--; + } + break; + } + case sizeof(u16): { + const __le16 *buf = buffer; + + WARN_ON(count & 1); + while (count) { + __raw_writew((__force u16)(*buf), addr); + buf++; + count -= 2; + } + break; + } + case sizeof(u32): { + const __le32 *buf = buffer; + + WARN_ON(count & 3); + while (count) { + __raw_writel((__force u32)(*buf), addr); + buf++; + count -= 4; + } + break; + } + default: + WARN_ON(1); + } +} +#endif /* CONFIG_SSB_BLOCKIO */ + +/* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */ +const struct ssb_bus_ops ssb_host_soc_ops = { + .read8 = ssb_host_soc_read8, + .read16 = ssb_host_soc_read16, + .read32 = ssb_host_soc_read32, + .write8 = ssb_host_soc_write8, + .write16 = ssb_host_soc_write16, + .write32 = ssb_host_soc_write32, +#ifdef CONFIG_SSB_BLOCKIO + .block_read = ssb_host_soc_block_read, + .block_write = ssb_host_soc_block_write, +#endif +}; + +int ssb_host_soc_get_invariants(struct ssb_bus *bus, + struct ssb_init_invariants *iv) +{ + char buf[20]; + int len, err; + + /* Fill boardinfo structure */ + memset(&iv->boardinfo, 0, sizeof(struct ssb_boardinfo)); + + len = bcm47xx_nvram_getenv("boardvendor", buf, sizeof(buf)); + if (len > 0) { + err = kstrtou16(strim(buf), 0, &iv->boardinfo.vendor); + if (err) + pr_warn("Couldn't parse nvram board vendor entry with value \"%s\"\n", + buf); + } + if (!iv->boardinfo.vendor) + iv->boardinfo.vendor = SSB_BOARDVENDOR_BCM; + + len = bcm47xx_nvram_getenv("boardtype", buf, sizeof(buf)); + if (len > 0) { + err = kstrtou16(strim(buf), 0, &iv->boardinfo.type); + if (err) + pr_warn("Couldn't parse nvram board type entry with value \"%s\"\n", + buf); + } + + memset(&iv->sprom, 0, sizeof(struct ssb_sprom)); + ssb_fill_sprom_with_fallback(bus, &iv->sprom); + + if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0) + iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10); + + return 0; +} |