/*
* 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 <m@bues.ch>
*
* 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.a0 = tuple->data[1];
sprom->antenna_gain.a1 = tuple->data[1];
sprom->antenna_gain.a2 = tuple->data[1];
sprom->antenna_gain.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;
}
