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ssb: Implement SDIO host bus support 

Add support for communicating with a Sonics Silicon Backplane through a
SDIO interface, as found in the Nintendo Wii WLAN daughter card.

The Nintendo Wii WLAN card includes a custom Broadcom 4318 chip with
a SDIO host interface.

Signed-off-by: Albert Herranz <albert_herranz@yahoo.es>
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Albert Herranz 2009-09-08 19:30:12 +02:00 committed by John W. Linville
parent f020979d5d
commit 24ea602e18
7 changed files with 756 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/ssb/Kconfig
View File

@ -66,6 +66,20 @@ config SSB_PCMCIAHOST
If unsure, say N If unsure, say N
config SSB_SDIOHOST_POSSIBLE
bool
depends on SSB && (MMC = y || MMC = SSB)
default y
config SSB_SDIOHOST
bool "Support for SSB on SDIO-bus host"
depends on SSB_SDIOHOST_POSSIBLE
help
Support for a Sonics Silicon Backplane on top
of a SDIO device.
If unsure, say N
config SSB_SILENT config SSB_SILENT
bool "No SSB kernel messages" bool "No SSB kernel messages"
depends on SSB && EMBEDDED depends on SSB && EMBEDDED

1
drivers/ssb/Makefile
View File

@ -6,6 +6,7 @@ ssb-$(CONFIG_SSB_SPROM) += sprom.o
# host support # host support
ssb-$(CONFIG_SSB_PCIHOST) += pci.o pcihost_wrapper.o ssb-$(CONFIG_SSB_PCIHOST) += pci.o pcihost_wrapper.o
ssb-$(CONFIG_SSB_PCMCIAHOST) += pcmcia.o ssb-$(CONFIG_SSB_PCMCIAHOST) += pcmcia.o
ssb-$(CONFIG_SSB_SDIOHOST) += sdio.o
# built-in drivers # built-in drivers
ssb-y += driver_chipcommon.o ssb-y += driver_chipcommon.o

58
drivers/ssb/main.c
View File

@ -17,6 +17,7 @@
#include <linux/ssb/ssb_driver_gige.h> #include <linux/ssb/ssb_driver_gige.h>
#include <linux/dma-mapping.h> #include <linux/dma-mapping.h>
#include <linux/pci.h> #include <linux/pci.h>
#include <linux/mmc/sdio_func.h>
#include <pcmcia/cs_types.h> #include <pcmcia/cs_types.h>
#include <pcmcia/cs.h> #include <pcmcia/cs.h>
@ -88,6 +89,25 @@ found:
} }
#endif /* CONFIG_SSB_PCMCIAHOST */ #endif /* CONFIG_SSB_PCMCIAHOST */
#ifdef CONFIG_SSB_SDIOHOST
struct ssb_bus *ssb_sdio_func_to_bus(struct sdio_func *func)
{
struct ssb_bus *bus;
ssb_buses_lock();
list_for_each_entry(bus, &buses, list) {
if (bus->bustype == SSB_BUSTYPE_SDIO &&
bus->host_sdio == func)
goto found;
}
bus = NULL;
found:
ssb_buses_unlock();
return bus;
}
#endif /* CONFIG_SSB_SDIOHOST */
int ssb_for_each_bus_call(unsigned long data, int ssb_for_each_bus_call(unsigned long data,
int (*func)(struct ssb_bus *bus, unsigned long data)) int (*func)(struct ssb_bus *bus, unsigned long data))
{ {
@ -467,6 +487,12 @@ static int ssb_devices_register(struct ssb_bus *bus)
#ifdef CONFIG_SSB_PCMCIAHOST #ifdef CONFIG_SSB_PCMCIAHOST
sdev->irq = bus->host_pcmcia->irq.AssignedIRQ; sdev->irq = bus->host_pcmcia->irq.AssignedIRQ;
dev->parent = &bus->host_pcmcia->dev; dev->parent = &bus->host_pcmcia->dev;
#endif
break;
case SSB_BUSTYPE_SDIO:
#ifdef CONFIG_SSB_SDIO
sdev->irq = bus->host_sdio->dev.irq;
dev->parent = &bus->host_sdio->dev;
#endif #endif
break; break;
case SSB_BUSTYPE_SSB: case SSB_BUSTYPE_SSB:
@ -724,12 +750,18 @@ static int ssb_bus_register(struct ssb_bus *bus,
err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1); err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1);
if (err) if (err)
goto out; goto out;
/* Init SDIO-host device (if any), before the scan */
err = ssb_sdio_init(bus);
if (err)
goto err_disable_xtal;
ssb_buses_lock(); ssb_buses_lock();
bus->busnumber = next_busnumber; bus->busnumber = next_busnumber;
/* Scan for devices (cores) */ /* Scan for devices (cores) */
err = ssb_bus_scan(bus, baseaddr); err = ssb_bus_scan(bus, baseaddr);
if (err) if (err)
goto err_disable_xtal; goto err_sdio_exit;
/* Init PCI-host device (if any) */ /* Init PCI-host device (if any) */
err = ssb_pci_init(bus); err = ssb_pci_init(bus);
@ -776,6 +808,8 @@ err_pci_exit:
ssb_pci_exit(bus); ssb_pci_exit(bus);
err_unmap: err_unmap:
ssb_iounmap(bus); ssb_iounmap(bus);
err_sdio_exit:
ssb_sdio_exit(bus);
err_disable_xtal: err_disable_xtal:
ssb_buses_unlock(); ssb_buses_unlock();
ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0); ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0);
@ -825,6 +859,28 @@ int ssb_bus_pcmciabus_register(struct ssb_bus *bus,
EXPORT_SYMBOL(ssb_bus_pcmciabus_register); EXPORT_SYMBOL(ssb_bus_pcmciabus_register);
#endif /* CONFIG_SSB_PCMCIAHOST */ #endif /* CONFIG_SSB_PCMCIAHOST */
#ifdef CONFIG_SSB_SDIOHOST
int ssb_bus_sdiobus_register(struct ssb_bus *bus, struct sdio_func *func,
unsigned int quirks)
{
int err;
bus->bustype = SSB_BUSTYPE_SDIO;
bus->host_sdio = func;
bus->ops = &ssb_sdio_ops;
bus->quirks = quirks;
err = ssb_bus_register(bus, ssb_sdio_get_invariants, ~0);
if (!err) {
ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on "
"SDIO device %s\n", sdio_func_id(func));
}
return err;
}
EXPORT_SYMBOL(ssb_bus_sdiobus_register);
#endif /* CONFIG_SSB_PCMCIAHOST */
int ssb_bus_ssbbus_register(struct ssb_bus *bus, int ssb_bus_ssbbus_register(struct ssb_bus *bus,
unsigned long baseaddr, unsigned long baseaddr,
ssb_invariants_func_t get_invariants) ssb_invariants_func_t get_invariants)

11
drivers/ssb/scan.c
View File

@ -175,6 +175,9 @@ static u32 scan_read32(struct ssb_bus *bus, u8 current_coreidx,
} else } else
ssb_pcmcia_switch_segment(bus, 0); ssb_pcmcia_switch_segment(bus, 0);
break; break;
case SSB_BUSTYPE_SDIO:
offset += current_coreidx * SSB_CORE_SIZE;
return ssb_sdio_scan_read32(bus, offset);
} }
return readl(bus->mmio + offset); return readl(bus->mmio + offset);
} }
@ -188,6 +191,8 @@ static int scan_switchcore(struct ssb_bus *bus, u8 coreidx)
return ssb_pci_switch_coreidx(bus, coreidx); return ssb_pci_switch_coreidx(bus, coreidx);
case SSB_BUSTYPE_PCMCIA: case SSB_BUSTYPE_PCMCIA:
return ssb_pcmcia_switch_coreidx(bus, coreidx); return ssb_pcmcia_switch_coreidx(bus, coreidx);
case SSB_BUSTYPE_SDIO:
return ssb_sdio_scan_switch_coreidx(bus, coreidx);
} }
return 0; return 0;
} }
@ -206,6 +211,8 @@ void ssb_iounmap(struct ssb_bus *bus)
SSB_BUG_ON(1); /* Can't reach this code. */ SSB_BUG_ON(1); /* Can't reach this code. */
#endif #endif
break; break;
case SSB_BUSTYPE_SDIO:
break;
} }
bus->mmio = NULL; bus->mmio = NULL;
bus->mapped_device = NULL; bus->mapped_device = NULL;
@ -230,6 +237,10 @@ static void __iomem *ssb_ioremap(struct ssb_bus *bus,
SSB_BUG_ON(1); /* Can't reach this code. */ SSB_BUG_ON(1); /* Can't reach this code. */
#endif #endif
break; break;
case SSB_BUSTYPE_SDIO:
/* Nothing to ioremap in the SDIO case, just fake it */
mmio = (void __iomem *)baseaddr;
break;
} }
return mmio; return mmio;

610
drivers/ssb/sdio.c Normal file
View File

@ -0,0 +1,610 @@
/*
* 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 1
/* 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=%u), 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=%u), 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;
}

40
drivers/ssb/ssb_private.h
View File

@ -114,6 +114,46 @@ static inline int ssb_pcmcia_init(struct ssb_bus *bus)
} }
#endif /* CONFIG_SSB_PCMCIAHOST */ #endif /* CONFIG_SSB_PCMCIAHOST */
/* sdio.c */
#ifdef CONFIG_SSB_SDIOHOST
extern int ssb_sdio_get_invariants(struct ssb_bus *bus,
struct ssb_init_invariants *iv);
extern u32 ssb_sdio_scan_read32(struct ssb_bus *bus, u16 offset);
extern int ssb_sdio_switch_core(struct ssb_bus *bus, struct ssb_device *dev);
extern int ssb_sdio_scan_switch_coreidx(struct ssb_bus *bus, u8 coreidx);
extern int ssb_sdio_hardware_setup(struct ssb_bus *bus);
extern void ssb_sdio_exit(struct ssb_bus *bus);
extern int ssb_sdio_init(struct ssb_bus *bus);
extern const struct ssb_bus_ops ssb_sdio_ops;
#else /* CONFIG_SSB_SDIOHOST */
static inline u32 ssb_sdio_scan_read32(struct ssb_bus *bus, u16 offset)
{
return 0;
}
static inline int ssb_sdio_switch_core(struct ssb_bus *bus,
struct ssb_device *dev)
{
return 0;
}
static inline int ssb_sdio_scan_switch_coreidx(struct ssb_bus *bus, u8 coreidx)
{
return 0;
}
static inline int ssb_sdio_hardware_setup(struct ssb_bus *bus)
{
return 0;
}
static inline void ssb_sdio_exit(struct ssb_bus *bus)
{
}
static inline int ssb_sdio_init(struct ssb_bus *bus)
{
return 0;
}
#endif /* CONFIG_SSB_SDIOHOST */
/* scan.c */ /* scan.c */
extern const char *ssb_core_name(u16 coreid); extern const char *ssb_core_name(u16 coreid);

21
include/linux/ssb/ssb.h
View File

@ -238,6 +238,7 @@ enum ssb_bustype {
SSB_BUSTYPE_SSB, /* This SSB bus is the system bus */ SSB_BUSTYPE_SSB, /* This SSB bus is the system bus */
SSB_BUSTYPE_PCI, /* SSB is connected to PCI bus */ SSB_BUSTYPE_PCI, /* SSB is connected to PCI bus */
SSB_BUSTYPE_PCMCIA, /* SSB is connected to PCMCIA bus */ SSB_BUSTYPE_PCMCIA, /* SSB is connected to PCMCIA bus */
SSB_BUSTYPE_SDIO, /* SSB is connected to SDIO bus */
}; };
/* board_vendor */ /* board_vendor */
@ -270,8 +271,12 @@ struct ssb_bus {
/* The core in the basic address register window. (PCI bus only) */ /* The core in the basic address register window. (PCI bus only) */
struct ssb_device *mapped_device; struct ssb_device *mapped_device;
union {
/* Currently mapped PCMCIA segment. (bustype == SSB_BUSTYPE_PCMCIA only) */ /* Currently mapped PCMCIA segment. (bustype == SSB_BUSTYPE_PCMCIA only) */
u8 mapped_pcmcia_seg; u8 mapped_pcmcia_seg;
/* Current SSB base address window for SDIO. */
u32 sdio_sbaddr;
};
/* Lock for core and segment switching. /* Lock for core and segment switching.
* On PCMCIA-host busses this is used to protect the whole MMIO access. */ * On PCMCIA-host busses this is used to protect the whole MMIO access. */
spinlock_t bar_lock; spinlock_t bar_lock;
@ -282,6 +287,11 @@ struct ssb_bus {
struct pci_dev *host_pci; struct pci_dev *host_pci;
/* Pointer to the PCMCIA device (only if bustype == SSB_BUSTYPE_PCMCIA). */ /* Pointer to the PCMCIA device (only if bustype == SSB_BUSTYPE_PCMCIA). */
struct pcmcia_device *host_pcmcia; struct pcmcia_device *host_pcmcia;
/* Pointer to the SDIO device (only if bustype == SSB_BUSTYPE_SDIO). */
struct sdio_func *host_sdio;
/* See enum ssb_quirks */
unsigned int quirks;
#ifdef CONFIG_SSB_SPROM #ifdef CONFIG_SSB_SPROM
/* Mutex to protect the SPROM writing. */ /* Mutex to protect the SPROM writing. */
@ -336,6 +346,11 @@ struct ssb_bus {
#endif /* DEBUG */ #endif /* DEBUG */
}; };
enum ssb_quirks {
/* SDIO connected card requires performing a read after writing a 32-bit value */
SSB_QUIRK_SDIO_READ_AFTER_WRITE32 = (1 << 0),
};
/* The initialization-invariants. */ /* The initialization-invariants. */
struct ssb_init_invariants { struct ssb_init_invariants {
/* Versioning information about the PCB. */ /* Versioning information about the PCB. */
@ -366,6 +381,12 @@ extern int ssb_bus_pcmciabus_register(struct ssb_bus *bus,
struct pcmcia_device *pcmcia_dev, struct pcmcia_device *pcmcia_dev,
unsigned long baseaddr); unsigned long baseaddr);
#endif /* CONFIG_SSB_PCMCIAHOST */ #endif /* CONFIG_SSB_PCMCIAHOST */
#ifdef CONFIG_SSB_SDIOHOST
extern int ssb_bus_sdiobus_register(struct ssb_bus *bus,
struct sdio_func *sdio_func,
unsigned int quirks);
#endif /* CONFIG_SSB_SDIOHOST */
extern void ssb_bus_unregister(struct ssb_bus *bus); extern void ssb_bus_unregister(struct ssb_bus *bus);