++#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
projects / openwrt.git / blobdiff