/* * Sonics Silicon Backplane * SDIO-Hostbus related functions * * Copyright 2009 Albert Herranz <albert_herranz@yahoo.es> * * Based on drivers/ssb/pcmcia.c * Copyright 2006 Johannes Berg <johannes@sipsolutions.net> * Copyright 2007-2008 Michael Buesch <mb@bu3sch.de> * * Licensed under the GNU/GPL. See COPYING for details. * */ #include <linux/ssb/ssb.h> #include <linux/delay.h> #include <linux/io.h> #include <linux/etherdevice.h> #include <linux/mmc/sdio_func.h> #include "ssb_private.h" /* Define the following to 1 to enable a printk on each coreswitch. */ #define SSB_VERBOSE_SDIOCORESWITCH_DEBUG 0 /* Hardware invariants CIS tuples */ #define SSB_SDIO_CIS 0x80 #define SSB_SDIO_CIS_SROMREV 0x00 #define SSB_SDIO_CIS_ID 0x01 #define SSB_SDIO_CIS_BOARDREV 0x02 #define SSB_SDIO_CIS_PA 0x03 #define SSB_SDIO_CIS_PA_PA0B0_LO 0 #define SSB_SDIO_CIS_PA_PA0B0_HI 1 #define SSB_SDIO_CIS_PA_PA0B1_LO 2 #define SSB_SDIO_CIS_PA_PA0B1_HI 3 #define SSB_SDIO_CIS_PA_PA0B2_LO 4 #define SSB_SDIO_CIS_PA_PA0B2_HI 5 #define SSB_SDIO_CIS_PA_ITSSI 6 #define SSB_SDIO_CIS_PA_MAXPOW 7 #define SSB_SDIO_CIS_OEMNAME 0x04 #define SSB_SDIO_CIS_CCODE 0x05 #define SSB_SDIO_CIS_ANTENNA 0x06 #define SSB_SDIO_CIS_ANTGAIN 0x07 #define SSB_SDIO_CIS_BFLAGS 0x08 #define SSB_SDIO_CIS_LEDS 0x09 #define CISTPL_FUNCE_LAN_NODE_ID 0x04 /* same as in PCMCIA */ /* * Function 1 miscellaneous registers. * * Definitions match src/include/sbsdio.h from the * Android Open Source Project * http://android.git.kernel.org/?p=platform/system/wlan/broadcom.git * */ #define SBSDIO_FUNC1_SBADDRLOW 0x1000a /* SB Address window Low (b15) */ #define SBSDIO_FUNC1_SBADDRMID 0x1000b /* SB Address window Mid (b23-b16) */ #define SBSDIO_FUNC1_SBADDRHIGH 0x1000c /* SB Address window High (b24-b31) */ /* valid bits in SBSDIO_FUNC1_SBADDRxxx regs */ #define SBSDIO_SBADDRLOW_MASK 0x80 /* Valid address bits in SBADDRLOW */ #define SBSDIO_SBADDRMID_MASK 0xff /* Valid address bits in SBADDRMID */ #define SBSDIO_SBADDRHIGH_MASK 0xff /* Valid address bits in SBADDRHIGH */ #define SBSDIO_SB_OFT_ADDR_MASK 0x7FFF /* sb offset addr is <= 15 bits, 32k */ /* REVISIT: this flag doesn't seem to matter */ #define SBSDIO_SB_ACCESS_2_4B_FLAG 0x8000 /* forces 32-bit SB access */ /* * Address map within the SDIO function address space (128K). * * Start End Description * ------- ------- ------------------------------------------ * 0x00000 0x0ffff selected backplane address window (64K) * 0x10000 0x1ffff backplane control registers (max 64K) * * The current address window is configured by writing to registers * SBADDRLOW, SBADDRMID and SBADDRHIGH. * * In order to access the contents of a 32-bit Silicon Backplane address * the backplane address window must be first loaded with the highest * 16 bits of the target address. Then, an access must be done to the * SDIO function address space using the lower 15 bits of the address. * Bit 15 of the address must be set when doing 32 bit accesses. * * 10987654321098765432109876543210 * WWWWWWWWWWWWWWWWW SB Address Window * OOOOOOOOOOOOOOOO Offset within SB Address Window * a 32-bit access flag */ /* * SSB I/O via SDIO. * * NOTE: SDIO address @addr is 17 bits long (SDIO address space is 128K). */ static inline struct device *ssb_sdio_dev(struct ssb_bus *bus) { return &bus->host_sdio->dev; } /* host claimed */ static int ssb_sdio_writeb(struct ssb_bus *bus, unsigned int addr, u8 val) { int error = 0; sdio_writeb(bus->host_sdio, val, addr, &error); if (unlikely(error)) { dev_dbg(ssb_sdio_dev(bus), "%08X <- %02x, error %d\n", addr, val, error); } return error; } #if 0 static u8 ssb_sdio_readb(struct ssb_bus *bus, unsigned int addr) { u8 val; int error = 0; val = sdio_readb(bus->host_sdio, addr, &error); if (unlikely(error)) { dev_dbg(ssb_sdio_dev(bus), "%08X -> %02x, error %d\n", addr, val, error); } return val; } #endif /* host claimed */ static int ssb_sdio_set_sbaddr_window(struct ssb_bus *bus, u32 address) { int error; error = ssb_sdio_writeb(bus, SBSDIO_FUNC1_SBADDRLOW, (address >> 8) & SBSDIO_SBADDRLOW_MASK); if (error) goto out; error = ssb_sdio_writeb(bus, SBSDIO_FUNC1_SBADDRMID, (address >> 16) & SBSDIO_SBADDRMID_MASK); if (error) goto out; error = ssb_sdio_writeb(bus, SBSDIO_FUNC1_SBADDRHIGH, (address >> 24) & SBSDIO_SBADDRHIGH_MASK); if (error) goto out; bus->sdio_sbaddr = address; out: if (error) { dev_dbg(ssb_sdio_dev(bus), "failed to set address window" " to 0x%08x, error %d\n", address, error); } return error; } /* for enumeration use only */ u32 ssb_sdio_scan_read32(struct ssb_bus *bus, u16 offset) { u32 val; int error; sdio_claim_host(bus->host_sdio); val = sdio_readl(bus->host_sdio, offset, &error); sdio_release_host(bus->host_sdio); if (unlikely(error)) { dev_dbg(ssb_sdio_dev(bus), "%04X:%04X > %08x, error %d\n", bus->sdio_sbaddr >> 16, offset, val, error); } return val; } /* for enumeration use only */ int ssb_sdio_scan_switch_coreidx(struct ssb_bus *bus, u8 coreidx) { u32 sbaddr; int error; sbaddr = (coreidx * SSB_CORE_SIZE) + SSB_ENUM_BASE; sdio_claim_host(bus->host_sdio); error = ssb_sdio_set_sbaddr_window(bus, sbaddr); sdio_release_host(bus->host_sdio); if (error) { dev_err(ssb_sdio_dev(bus), "failed to switch to core %u," " error %d\n", coreidx, error); goto out; } out: return error; } /* host must be already claimed */ int ssb_sdio_switch_core(struct ssb_bus *bus, struct ssb_device *dev) { u8 coreidx = dev->core_index; u32 sbaddr; int error = 0; sbaddr = (coreidx * SSB_CORE_SIZE) + SSB_ENUM_BASE; if (unlikely(bus->sdio_sbaddr != sbaddr)) { #if SSB_VERBOSE_SDIOCORESWITCH_DEBUG dev_info(ssb_sdio_dev(bus), "switching to %s core, index %d\n", ssb_core_name(dev->id.coreid), coreidx); #endif error = ssb_sdio_set_sbaddr_window(bus, sbaddr); if (error) { dev_dbg(ssb_sdio_dev(bus), "failed to switch to" " core %u, error %d\n", coreidx, error); goto out; } bus->mapped_device = dev; } out: return error; } static u8 ssb_sdio_read8(struct ssb_device *dev, u16 offset) { struct ssb_bus *bus = dev->bus; u8 val = 0xff; int error = 0; sdio_claim_host(bus->host_sdio); if (unlikely(ssb_sdio_switch_core(bus, dev))) goto out; offset |= bus->sdio_sbaddr & 0xffff; offset &= SBSDIO_SB_OFT_ADDR_MASK; val = sdio_readb(bus->host_sdio, offset, &error); if (error) { dev_dbg(ssb_sdio_dev(bus), "%04X:%04X > %02x, error %d\n", bus->sdio_sbaddr >> 16, offset, val, error); } out: sdio_release_host(bus->host_sdio); return val; } static u16 ssb_sdio_read16(struct ssb_device *dev, u16 offset) { struct ssb_bus *bus = dev->bus; u16 val = 0xffff; int error = 0; sdio_claim_host(bus->host_sdio); if (unlikely(ssb_sdio_switch_core(bus, dev))) goto out; offset |= bus->sdio_sbaddr & 0xffff; offset &= SBSDIO_SB_OFT_ADDR_MASK; val = sdio_readw(bus->host_sdio, offset, &error); if (error) { dev_dbg(ssb_sdio_dev(bus), "%04X:%04X > %04x, error %d\n", bus->sdio_sbaddr >> 16, offset, val, error); } out: sdio_release_host(bus->host_sdio); return val; } static u32 ssb_sdio_read32(struct ssb_device *dev, u16 offset) { struct ssb_bus *bus = dev->bus; u32 val = 0xffffffff; int error = 0; sdio_claim_host(bus->host_sdio); if (unlikely(ssb_sdio_switch_core(bus, dev))) goto out; offset |= bus->sdio_sbaddr & 0xffff; offset &= SBSDIO_SB_OFT_ADDR_MASK; offset |= SBSDIO_SB_ACCESS_2_4B_FLAG; /* 32 bit data access */ val = sdio_readl(bus->host_sdio, offset, &error); if (error) { dev_dbg(ssb_sdio_dev(bus), "%04X:%04X > %08x, error %d\n", bus->sdio_sbaddr >> 16, offset, val, error); } out: sdio_release_host(bus->host_sdio); return val; } #ifdef CONFIG_SSB_BLOCKIO static void ssb_sdio_block_read(struct ssb_device *dev, void *buffer, size_t count, u16 offset, u8 reg_width) { size_t saved_count = count; struct ssb_bus *bus = dev->bus; int error = 0; sdio_claim_host(bus->host_sdio); if (unlikely(ssb_sdio_switch_core(bus, dev))) { error = -EIO; memset(buffer, 0xff, count); goto err_out; } offset |= bus->sdio_sbaddr & 0xffff; offset &= SBSDIO_SB_OFT_ADDR_MASK; switch (reg_width) { case sizeof(u8): { error = sdio_readsb(bus->host_sdio, buffer, offset, count); break; } case sizeof(u16): { SSB_WARN_ON(count & 1); error = sdio_readsb(bus->host_sdio, buffer, offset, count); break; } case sizeof(u32): { SSB_WARN_ON(count & 3); offset |= SBSDIO_SB_ACCESS_2_4B_FLAG; /* 32 bit data access */ error = sdio_readsb(bus->host_sdio, buffer, offset, count); break; } default: SSB_WARN_ON(1); } if (!error) goto out; err_out: dev_dbg(ssb_sdio_dev(bus), "%04X:%04X (width=%u, len=%zu), error %d\n", bus->sdio_sbaddr >> 16, offset, reg_width, saved_count, error); out: sdio_release_host(bus->host_sdio); } #endif /* CONFIG_SSB_BLOCKIO */ static void ssb_sdio_write8(struct ssb_device *dev, u16 offset, u8 val) { struct ssb_bus *bus = dev->bus; int error = 0; sdio_claim_host(bus->host_sdio); if (unlikely(ssb_sdio_switch_core(bus, dev))) goto out; offset |= bus->sdio_sbaddr & 0xffff; offset &= SBSDIO_SB_OFT_ADDR_MASK; sdio_writeb(bus->host_sdio, val, offset, &error); if (error) { dev_dbg(ssb_sdio_dev(bus), "%04X:%04X < %02x, error %d\n", bus->sdio_sbaddr >> 16, offset, val, error); } out: sdio_release_host(bus->host_sdio); } static void ssb_sdio_write16(struct ssb_device *dev, u16 offset, u16 val) { struct ssb_bus *bus = dev->bus; int error = 0; sdio_claim_host(bus->host_sdio); if (unlikely(ssb_sdio_switch_core(bus, dev))) goto out; offset |= bus->sdio_sbaddr & 0xffff; offset &= SBSDIO_SB_OFT_ADDR_MASK; sdio_writew(bus->host_sdio, val, offset, &error); if (error) { dev_dbg(ssb_sdio_dev(bus), "%04X:%04X < %04x, error %d\n", bus->sdio_sbaddr >> 16, offset, val, error); } out: sdio_release_host(bus->host_sdio); } static void ssb_sdio_write32(struct ssb_device *dev, u16 offset, u32 val) { struct ssb_bus *bus = dev->bus; int error = 0; sdio_claim_host(bus->host_sdio); if (unlikely(ssb_sdio_switch_core(bus, dev))) goto out; offset |= bus->sdio_sbaddr & 0xffff; offset &= SBSDIO_SB_OFT_ADDR_MASK; offset |= SBSDIO_SB_ACCESS_2_4B_FLAG; /* 32 bit data access */ sdio_writel(bus->host_sdio, val, offset, &error); if (error) { dev_dbg(ssb_sdio_dev(bus), "%04X:%04X < %08x, error %d\n", bus->sdio_sbaddr >> 16, offset, val, error); } if (bus->quirks & SSB_QUIRK_SDIO_READ_AFTER_WRITE32) sdio_readl(bus->host_sdio, 0, &error); out: sdio_release_host(bus->host_sdio); } #ifdef CONFIG_SSB_BLOCKIO static void ssb_sdio_block_write(struct ssb_device *dev, const void *buffer, size_t count, u16 offset, u8 reg_width) { size_t saved_count = count; struct ssb_bus *bus = dev->bus; int error = 0; sdio_claim_host(bus->host_sdio); if (unlikely(ssb_sdio_switch_core(bus, dev))) { error = -EIO; memset((void *)buffer, 0xff, count); goto err_out; } offset |= bus->sdio_sbaddr & 0xffff; offset &= SBSDIO_SB_OFT_ADDR_MASK; switch (reg_width) { case sizeof(u8): error = sdio_writesb(bus->host_sdio, offset, (void *)buffer, count); break; case sizeof(u16): SSB_WARN_ON(count & 1); error = sdio_writesb(bus->host_sdio, offset, (void *)buffer, count); break; case sizeof(u32): SSB_WARN_ON(count & 3); offset |= SBSDIO_SB_ACCESS_2_4B_FLAG; /* 32 bit data access */ error = sdio_writesb(bus->host_sdio, offset, (void *)buffer, count); break; default: SSB_WARN_ON(1); } if (!error) goto out; err_out: dev_dbg(ssb_sdio_dev(bus), "%04X:%04X (width=%u, len=%zu), error %d\n", bus->sdio_sbaddr >> 16, offset, reg_width, saved_count, error); out: sdio_release_host(bus->host_sdio); } #endif /* CONFIG_SSB_BLOCKIO */ /* Not "static", as it's used in main.c */ const struct ssb_bus_ops ssb_sdio_ops = { .read8 = ssb_sdio_read8, .read16 = ssb_sdio_read16, .read32 = ssb_sdio_read32, .write8 = ssb_sdio_write8, .write16 = ssb_sdio_write16, .write32 = ssb_sdio_write32, #ifdef CONFIG_SSB_BLOCKIO .block_read = ssb_sdio_block_read, .block_write = ssb_sdio_block_write, #endif }; #define GOTO_ERROR_ON(condition, description) do { \ if (unlikely(condition)) { \ error_description = description; \ goto error; \ } \ } while (0) int ssb_sdio_get_invariants(struct ssb_bus *bus, struct ssb_init_invariants *iv) { struct ssb_sprom *sprom = &iv->sprom; struct ssb_boardinfo *bi = &iv->boardinfo; const char *error_description = "none"; struct sdio_func_tuple *tuple; void *mac; memset(sprom, 0xFF, sizeof(*sprom)); sprom->boardflags_lo = 0; sprom->boardflags_hi = 0; tuple = bus->host_sdio->tuples; while (tuple) { switch (tuple->code) { case 0x22: /* extended function */ switch (tuple->data[0]) { case CISTPL_FUNCE_LAN_NODE_ID: GOTO_ERROR_ON((tuple->size != 7) && (tuple->data[1] != 6), "mac tpl size"); /* fetch the MAC address. */ mac = tuple->data + 2; memcpy(sprom->il0mac, mac, ETH_ALEN); memcpy(sprom->et1mac, mac, ETH_ALEN); break; default: break; } break; case 0x80: /* vendor specific tuple */ switch (tuple->data[0]) { case SSB_SDIO_CIS_SROMREV: GOTO_ERROR_ON(tuple->size != 2, "sromrev tpl size"); sprom->revision = tuple->data[1]; break; case SSB_SDIO_CIS_ID: GOTO_ERROR_ON((tuple->size != 5) && (tuple->size != 7), "id tpl size"); bi->vendor = tuple->data[1] | (tuple->data[2]<<8); break; case SSB_SDIO_CIS_BOARDREV: GOTO_ERROR_ON(tuple->size != 2, "boardrev tpl size"); sprom->board_rev = tuple->data[1]; break; case SSB_SDIO_CIS_PA: GOTO_ERROR_ON((tuple->size != 9) && (tuple->size != 10), "pa tpl size"); sprom->pa0b0 = tuple->data[1] | ((u16)tuple->data[2] << 8); sprom->pa0b1 = tuple->data[3] | ((u16)tuple->data[4] << 8); sprom->pa0b2 = tuple->data[5] | ((u16)tuple->data[6] << 8); sprom->itssi_a = tuple->data[7]; sprom->itssi_bg = tuple->data[7]; sprom->maxpwr_a = tuple->data[8]; sprom->maxpwr_bg = tuple->data[8]; break; case SSB_SDIO_CIS_OEMNAME: /* Not present */ break; case SSB_SDIO_CIS_CCODE: GOTO_ERROR_ON(tuple->size != 2, "ccode tpl size"); sprom->country_code = tuple->data[1]; break; case SSB_SDIO_CIS_ANTENNA: GOTO_ERROR_ON(tuple->size != 2, "ant tpl size"); sprom->ant_available_a = tuple->data[1]; sprom->ant_available_bg = tuple->data[1]; break; case SSB_SDIO_CIS_ANTGAIN: GOTO_ERROR_ON(tuple->size != 2, "antg tpl size"); sprom->antenna_gain.ghz24.a0 = tuple->data[1]; sprom->antenna_gain.ghz24.a1 = tuple->data[1]; sprom->antenna_gain.ghz24.a2 = tuple->data[1]; sprom->antenna_gain.ghz24.a3 = tuple->data[1]; sprom->antenna_gain.ghz5.a0 = tuple->data[1]; sprom->antenna_gain.ghz5.a1 = tuple->data[1]; sprom->antenna_gain.ghz5.a2 = tuple->data[1]; sprom->antenna_gain.ghz5.a3 = tuple->data[1]; break; case SSB_SDIO_CIS_BFLAGS: GOTO_ERROR_ON((tuple->size != 3) && (tuple->size != 5), "bfl tpl size"); sprom->boardflags_lo = tuple->data[1] | ((u16)tuple->data[2] << 8); break; case SSB_SDIO_CIS_LEDS: GOTO_ERROR_ON(tuple->size != 5, "leds tpl size"); sprom->gpio0 = tuple->data[1]; sprom->gpio1 = tuple->data[2]; sprom->gpio2 = tuple->data[3]; sprom->gpio3 = tuple->data[4]; break; default: break; } break; default: break; } tuple = tuple->next; } return 0; error: dev_err(ssb_sdio_dev(bus), "failed to fetch device invariants: %s\n", error_description); return -ENODEV; } void ssb_sdio_exit(struct ssb_bus *bus) { if (bus->bustype != SSB_BUSTYPE_SDIO) return; /* Nothing to do here. */ } int ssb_sdio_init(struct ssb_bus *bus) { if (bus->bustype != SSB_BUSTYPE_SDIO) return 0; bus->sdio_sbaddr = ~0; return 0; }