android_kernel_xiaomi_sm8350/drivers/ssb/pci.c
Larry Finger 4503183aa3 ssb: Fix all-ones boardflags
In the SSB SPROM a field set to all ones means the value
is not defined in the SPROM.
In case of the boardflags, we need to set them to zero
to avoid confusing drivers. Drivers will only check the
flags by ANDing.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Gabor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-04-23 21:25:35 -04:00

801 lines
21 KiB
C

/*
* Sonics Silicon Backplane PCI-Hostbus related functions.
*
* Copyright (C) 2005-2006 Michael Buesch <mb@bu3sch.de>
* Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
* Copyright (C) 2005 Stefano Brivio <st3@riseup.net>
* Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
* Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
*
* Derived from the Broadcom 4400 device driver.
* Copyright (C) 2002 David S. Miller (davem@redhat.com)
* Fixed by Pekka Pietikainen (pp@ee.oulu.fi)
* Copyright (C) 2006 Broadcom Corporation.
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_regs.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include "ssb_private.h"
/* Define the following to 1 to enable a printk on each coreswitch. */
#define SSB_VERBOSE_PCICORESWITCH_DEBUG 0
/* Lowlevel coreswitching */
int ssb_pci_switch_coreidx(struct ssb_bus *bus, u8 coreidx)
{
int err;
int attempts = 0;
u32 cur_core;
while (1) {
err = pci_write_config_dword(bus->host_pci, SSB_BAR0_WIN,
(coreidx * SSB_CORE_SIZE)
+ SSB_ENUM_BASE);
if (err)
goto error;
err = pci_read_config_dword(bus->host_pci, SSB_BAR0_WIN,
&cur_core);
if (err)
goto error;
cur_core = (cur_core - SSB_ENUM_BASE)
/ SSB_CORE_SIZE;
if (cur_core == coreidx)
break;
if (attempts++ > SSB_BAR0_MAX_RETRIES)
goto error;
udelay(10);
}
return 0;
error:
ssb_printk(KERN_ERR PFX "Failed to switch to core %u\n", coreidx);
return -ENODEV;
}
int ssb_pci_switch_core(struct ssb_bus *bus,
struct ssb_device *dev)
{
int err;
unsigned long flags;
#if SSB_VERBOSE_PCICORESWITCH_DEBUG
ssb_printk(KERN_INFO PFX
"Switching to %s core, index %d\n",
ssb_core_name(dev->id.coreid),
dev->core_index);
#endif
spin_lock_irqsave(&bus->bar_lock, flags);
err = ssb_pci_switch_coreidx(bus, dev->core_index);
if (!err)
bus->mapped_device = dev;
spin_unlock_irqrestore(&bus->bar_lock, flags);
return err;
}
/* Enable/disable the on board crystal oscillator and/or PLL. */
int ssb_pci_xtal(struct ssb_bus *bus, u32 what, int turn_on)
{
int err;
u32 in, out, outenable;
u16 pci_status;
if (bus->bustype != SSB_BUSTYPE_PCI)
return 0;
err = pci_read_config_dword(bus->host_pci, SSB_GPIO_IN, &in);
if (err)
goto err_pci;
err = pci_read_config_dword(bus->host_pci, SSB_GPIO_OUT, &out);
if (err)
goto err_pci;
err = pci_read_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE, &outenable);
if (err)
goto err_pci;
outenable |= what;
if (turn_on) {
/* Avoid glitching the clock if GPRS is already using it.
* We can't actually read the state of the PLLPD so we infer it
* by the value of XTAL_PU which *is* readable via gpioin.
*/
if (!(in & SSB_GPIO_XTAL)) {
if (what & SSB_GPIO_XTAL) {
/* Turn the crystal on */
out |= SSB_GPIO_XTAL;
if (what & SSB_GPIO_PLL)
out |= SSB_GPIO_PLL;
err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
if (err)
goto err_pci;
err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE,
outenable);
if (err)
goto err_pci;
msleep(1);
}
if (what & SSB_GPIO_PLL) {
/* Turn the PLL on */
out &= ~SSB_GPIO_PLL;
err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
if (err)
goto err_pci;
msleep(5);
}
}
err = pci_read_config_word(bus->host_pci, PCI_STATUS, &pci_status);
if (err)
goto err_pci;
pci_status &= ~PCI_STATUS_SIG_TARGET_ABORT;
err = pci_write_config_word(bus->host_pci, PCI_STATUS, pci_status);
if (err)
goto err_pci;
} else {
if (what & SSB_GPIO_XTAL) {
/* Turn the crystal off */
out &= ~SSB_GPIO_XTAL;
}
if (what & SSB_GPIO_PLL) {
/* Turn the PLL off */
out |= SSB_GPIO_PLL;
}
err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT, out);
if (err)
goto err_pci;
err = pci_write_config_dword(bus->host_pci, SSB_GPIO_OUT_ENABLE, outenable);
if (err)
goto err_pci;
}
out:
return err;
err_pci:
printk(KERN_ERR PFX "Error: ssb_pci_xtal() could not access PCI config space!\n");
err = -EBUSY;
goto out;
}
/* Get the word-offset for a SSB_SPROM_XXX define. */
#define SPOFF(offset) (((offset) - SSB_SPROM_BASE) / sizeof(u16))
/* Helper to extract some _offset, which is one of the SSB_SPROM_XXX defines. */
#define SPEX(_outvar, _offset, _mask, _shift) \
out->_outvar = ((in[SPOFF(_offset)] & (_mask)) >> (_shift))
static inline u8 ssb_crc8(u8 crc, u8 data)
{
/* Polynomial: x^8 + x^7 + x^6 + x^4 + x^2 + 1 */
static const u8 t[] = {
0x00, 0xF7, 0xB9, 0x4E, 0x25, 0xD2, 0x9C, 0x6B,
0x4A, 0xBD, 0xF3, 0x04, 0x6F, 0x98, 0xD6, 0x21,
0x94, 0x63, 0x2D, 0xDA, 0xB1, 0x46, 0x08, 0xFF,
0xDE, 0x29, 0x67, 0x90, 0xFB, 0x0C, 0x42, 0xB5,
0x7F, 0x88, 0xC6, 0x31, 0x5A, 0xAD, 0xE3, 0x14,
0x35, 0xC2, 0x8C, 0x7B, 0x10, 0xE7, 0xA9, 0x5E,
0xEB, 0x1C, 0x52, 0xA5, 0xCE, 0x39, 0x77, 0x80,
0xA1, 0x56, 0x18, 0xEF, 0x84, 0x73, 0x3D, 0xCA,
0xFE, 0x09, 0x47, 0xB0, 0xDB, 0x2C, 0x62, 0x95,
0xB4, 0x43, 0x0D, 0xFA, 0x91, 0x66, 0x28, 0xDF,
0x6A, 0x9D, 0xD3, 0x24, 0x4F, 0xB8, 0xF6, 0x01,
0x20, 0xD7, 0x99, 0x6E, 0x05, 0xF2, 0xBC, 0x4B,
0x81, 0x76, 0x38, 0xCF, 0xA4, 0x53, 0x1D, 0xEA,
0xCB, 0x3C, 0x72, 0x85, 0xEE, 0x19, 0x57, 0xA0,
0x15, 0xE2, 0xAC, 0x5B, 0x30, 0xC7, 0x89, 0x7E,
0x5F, 0xA8, 0xE6, 0x11, 0x7A, 0x8D, 0xC3, 0x34,
0xAB, 0x5C, 0x12, 0xE5, 0x8E, 0x79, 0x37, 0xC0,
0xE1, 0x16, 0x58, 0xAF, 0xC4, 0x33, 0x7D, 0x8A,
0x3F, 0xC8, 0x86, 0x71, 0x1A, 0xED, 0xA3, 0x54,
0x75, 0x82, 0xCC, 0x3B, 0x50, 0xA7, 0xE9, 0x1E,
0xD4, 0x23, 0x6D, 0x9A, 0xF1, 0x06, 0x48, 0xBF,
0x9E, 0x69, 0x27, 0xD0, 0xBB, 0x4C, 0x02, 0xF5,
0x40, 0xB7, 0xF9, 0x0E, 0x65, 0x92, 0xDC, 0x2B,
0x0A, 0xFD, 0xB3, 0x44, 0x2F, 0xD8, 0x96, 0x61,
0x55, 0xA2, 0xEC, 0x1B, 0x70, 0x87, 0xC9, 0x3E,
0x1F, 0xE8, 0xA6, 0x51, 0x3A, 0xCD, 0x83, 0x74,
0xC1, 0x36, 0x78, 0x8F, 0xE4, 0x13, 0x5D, 0xAA,
0x8B, 0x7C, 0x32, 0xC5, 0xAE, 0x59, 0x17, 0xE0,
0x2A, 0xDD, 0x93, 0x64, 0x0F, 0xF8, 0xB6, 0x41,
0x60, 0x97, 0xD9, 0x2E, 0x45, 0xB2, 0xFC, 0x0B,
0xBE, 0x49, 0x07, 0xF0, 0x9B, 0x6C, 0x22, 0xD5,
0xF4, 0x03, 0x4D, 0xBA, 0xD1, 0x26, 0x68, 0x9F,
};
return t[crc ^ data];
}
static u8 ssb_sprom_crc(const u16 *sprom, u16 size)
{
int word;
u8 crc = 0xFF;
for (word = 0; word < size - 1; word++) {
crc = ssb_crc8(crc, sprom[word] & 0x00FF);
crc = ssb_crc8(crc, (sprom[word] & 0xFF00) >> 8);
}
crc = ssb_crc8(crc, sprom[size - 1] & 0x00FF);
crc ^= 0xFF;
return crc;
}
static int sprom_check_crc(const u16 *sprom, size_t size)
{
u8 crc;
u8 expected_crc;
u16 tmp;
crc = ssb_sprom_crc(sprom, size);
tmp = sprom[size - 1] & SSB_SPROM_REVISION_CRC;
expected_crc = tmp >> SSB_SPROM_REVISION_CRC_SHIFT;
if (crc != expected_crc)
return -EPROTO;
return 0;
}
static int sprom_do_read(struct ssb_bus *bus, u16 *sprom)
{
int i;
for (i = 0; i < bus->sprom_size; i++)
sprom[i] = ioread16(bus->mmio + SSB_SPROM_BASE + (i * 2));
return 0;
}
static int sprom_do_write(struct ssb_bus *bus, const u16 *sprom)
{
struct pci_dev *pdev = bus->host_pci;
int i, err;
u32 spromctl;
u16 size = bus->sprom_size;
ssb_printk(KERN_NOTICE PFX "Writing SPROM. Do NOT turn off the power! Please stand by...\n");
err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
if (err)
goto err_ctlreg;
spromctl |= SSB_SPROMCTL_WE;
err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
if (err)
goto err_ctlreg;
ssb_printk(KERN_NOTICE PFX "[ 0%%");
msleep(500);
for (i = 0; i < size; i++) {
if (i == size / 4)
ssb_printk("25%%");
else if (i == size / 2)
ssb_printk("50%%");
else if (i == (size * 3) / 4)
ssb_printk("75%%");
else if (i % 2)
ssb_printk(".");
writew(sprom[i], bus->mmio + SSB_SPROM_BASE + (i * 2));
mmiowb();
msleep(20);
}
err = pci_read_config_dword(pdev, SSB_SPROMCTL, &spromctl);
if (err)
goto err_ctlreg;
spromctl &= ~SSB_SPROMCTL_WE;
err = pci_write_config_dword(pdev, SSB_SPROMCTL, spromctl);
if (err)
goto err_ctlreg;
msleep(500);
ssb_printk("100%% ]\n");
ssb_printk(KERN_NOTICE PFX "SPROM written.\n");
return 0;
err_ctlreg:
ssb_printk(KERN_ERR PFX "Could not access SPROM control register.\n");
return err;
}
static s8 r123_extract_antgain(u8 sprom_revision, const u16 *in,
u16 mask, u16 shift)
{
u16 v;
u8 gain;
v = in[SPOFF(SSB_SPROM1_AGAIN)];
gain = (v & mask) >> shift;
if (gain == 0xFF)
gain = 2; /* If unset use 2dBm */
if (sprom_revision == 1) {
/* Convert to Q5.2 */
gain <<= 2;
} else {
/* Q5.2 Fractional part is stored in 0xC0 */
gain = ((gain & 0xC0) >> 6) | ((gain & 0x3F) << 2);
}
return (s8)gain;
}
static void sprom_extract_r123(struct ssb_sprom *out, const u16 *in)
{
int i;
u16 v;
s8 gain;
u16 loc[3];
if (out->revision == 3) { /* rev 3 moved MAC */
loc[0] = SSB_SPROM3_IL0MAC;
loc[1] = SSB_SPROM3_ET0MAC;
loc[2] = SSB_SPROM3_ET1MAC;
} else {
loc[0] = SSB_SPROM1_IL0MAC;
loc[1] = SSB_SPROM1_ET0MAC;
loc[2] = SSB_SPROM1_ET1MAC;
}
for (i = 0; i < 3; i++) {
v = in[SPOFF(loc[0]) + i];
*(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
}
for (i = 0; i < 3; i++) {
v = in[SPOFF(loc[1]) + i];
*(((__be16 *)out->et0mac) + i) = cpu_to_be16(v);
}
for (i = 0; i < 3; i++) {
v = in[SPOFF(loc[2]) + i];
*(((__be16 *)out->et1mac) + i) = cpu_to_be16(v);
}
SPEX(et0phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0A, 0);
SPEX(et1phyaddr, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1A,
SSB_SPROM1_ETHPHY_ET1A_SHIFT);
SPEX(et0mdcport, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET0M, 14);
SPEX(et1mdcport, SSB_SPROM1_ETHPHY, SSB_SPROM1_ETHPHY_ET1M, 15);
SPEX(board_rev, SSB_SPROM1_BINF, SSB_SPROM1_BINF_BREV, 0);
SPEX(country_code, SSB_SPROM1_BINF, SSB_SPROM1_BINF_CCODE,
SSB_SPROM1_BINF_CCODE_SHIFT);
SPEX(ant_available_a, SSB_SPROM1_BINF, SSB_SPROM1_BINF_ANTA,
SSB_SPROM1_BINF_ANTA_SHIFT);
SPEX(ant_available_bg, SSB_SPROM1_BINF, SSB_SPROM1_BINF_ANTBG,
SSB_SPROM1_BINF_ANTBG_SHIFT);
SPEX(pa0b0, SSB_SPROM1_PA0B0, 0xFFFF, 0);
SPEX(pa0b1, SSB_SPROM1_PA0B1, 0xFFFF, 0);
SPEX(pa0b2, SSB_SPROM1_PA0B2, 0xFFFF, 0);
SPEX(pa1b0, SSB_SPROM1_PA1B0, 0xFFFF, 0);
SPEX(pa1b1, SSB_SPROM1_PA1B1, 0xFFFF, 0);
SPEX(pa1b2, SSB_SPROM1_PA1B2, 0xFFFF, 0);
SPEX(gpio0, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P0, 0);
SPEX(gpio1, SSB_SPROM1_GPIOA, SSB_SPROM1_GPIOA_P1,
SSB_SPROM1_GPIOA_P1_SHIFT);
SPEX(gpio2, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P2, 0);
SPEX(gpio3, SSB_SPROM1_GPIOB, SSB_SPROM1_GPIOB_P3,
SSB_SPROM1_GPIOB_P3_SHIFT);
SPEX(maxpwr_a, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_A,
SSB_SPROM1_MAXPWR_A_SHIFT);
SPEX(maxpwr_bg, SSB_SPROM1_MAXPWR, SSB_SPROM1_MAXPWR_BG, 0);
SPEX(itssi_a, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_A,
SSB_SPROM1_ITSSI_A_SHIFT);
SPEX(itssi_bg, SSB_SPROM1_ITSSI, SSB_SPROM1_ITSSI_BG, 0);
SPEX(boardflags_lo, SSB_SPROM1_BFLLO, 0xFFFF, 0);
if (out->revision >= 2)
SPEX(boardflags_hi, SSB_SPROM2_BFLHI, 0xFFFF, 0);
/* Extract the antenna gain values. */
gain = r123_extract_antgain(out->revision, in,
SSB_SPROM1_AGAIN_BG,
SSB_SPROM1_AGAIN_BG_SHIFT);
out->antenna_gain.ghz24.a0 = gain;
out->antenna_gain.ghz24.a1 = gain;
out->antenna_gain.ghz24.a2 = gain;
out->antenna_gain.ghz24.a3 = gain;
gain = r123_extract_antgain(out->revision, in,
SSB_SPROM1_AGAIN_A,
SSB_SPROM1_AGAIN_A_SHIFT);
out->antenna_gain.ghz5.a0 = gain;
out->antenna_gain.ghz5.a1 = gain;
out->antenna_gain.ghz5.a2 = gain;
out->antenna_gain.ghz5.a3 = gain;
}
static void sprom_extract_r4(struct ssb_sprom *out, const u16 *in)
{
int i;
u16 v;
/* extract the equivalent of the r1 variables */
for (i = 0; i < 3; i++) {
v = in[SPOFF(SSB_SPROM4_IL0MAC) + i];
*(((__be16 *)out->il0mac) + i) = cpu_to_be16(v);
}
for (i = 0; i < 3; i++) {
v = in[SPOFF(SSB_SPROM4_ET0MAC) + i];
*(((__be16 *)out->et0mac) + i) = cpu_to_be16(v);
}
for (i = 0; i < 3; i++) {
v = in[SPOFF(SSB_SPROM4_ET1MAC) + i];
*(((__be16 *)out->et1mac) + i) = cpu_to_be16(v);
}
SPEX(et0phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET0A, 0);
SPEX(et1phyaddr, SSB_SPROM4_ETHPHY, SSB_SPROM4_ETHPHY_ET1A,
SSB_SPROM4_ETHPHY_ET1A_SHIFT);
SPEX(country_code, SSB_SPROM4_CCODE, 0xFFFF, 0);
SPEX(boardflags_lo, SSB_SPROM4_BFLLO, 0xFFFF, 0);
SPEX(boardflags_hi, SSB_SPROM4_BFLHI, 0xFFFF, 0);
SPEX(ant_available_a, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_A,
SSB_SPROM4_ANTAVAIL_A_SHIFT);
SPEX(ant_available_bg, SSB_SPROM4_ANTAVAIL, SSB_SPROM4_ANTAVAIL_BG,
SSB_SPROM4_ANTAVAIL_BG_SHIFT);
SPEX(maxpwr_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_MAXP_BG_MASK, 0);
SPEX(itssi_bg, SSB_SPROM4_MAXP_BG, SSB_SPROM4_ITSSI_BG,
SSB_SPROM4_ITSSI_BG_SHIFT);
SPEX(maxpwr_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_MAXP_A_MASK, 0);
SPEX(itssi_a, SSB_SPROM4_MAXP_A, SSB_SPROM4_ITSSI_A,
SSB_SPROM4_ITSSI_A_SHIFT);
SPEX(gpio0, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P0, 0);
SPEX(gpio1, SSB_SPROM4_GPIOA, SSB_SPROM4_GPIOA_P1,
SSB_SPROM4_GPIOA_P1_SHIFT);
SPEX(gpio2, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P2, 0);
SPEX(gpio3, SSB_SPROM4_GPIOB, SSB_SPROM4_GPIOB_P3,
SSB_SPROM4_GPIOB_P3_SHIFT);
/* Extract the antenna gain values. */
SPEX(antenna_gain.ghz24.a0, SSB_SPROM4_AGAIN01,
SSB_SPROM4_AGAIN0, SSB_SPROM4_AGAIN0_SHIFT);
SPEX(antenna_gain.ghz24.a1, SSB_SPROM4_AGAIN01,
SSB_SPROM4_AGAIN1, SSB_SPROM4_AGAIN1_SHIFT);
SPEX(antenna_gain.ghz24.a2, SSB_SPROM4_AGAIN23,
SSB_SPROM4_AGAIN2, SSB_SPROM4_AGAIN2_SHIFT);
SPEX(antenna_gain.ghz24.a3, SSB_SPROM4_AGAIN23,
SSB_SPROM4_AGAIN3, SSB_SPROM4_AGAIN3_SHIFT);
memcpy(&out->antenna_gain.ghz5, &out->antenna_gain.ghz24,
sizeof(out->antenna_gain.ghz5));
/* TODO - get remaining rev 4 stuff needed */
}
static int sprom_extract(struct ssb_bus *bus, struct ssb_sprom *out,
const u16 *in, u16 size)
{
memset(out, 0, sizeof(*out));
out->revision = in[size - 1] & 0x00FF;
ssb_dprintk(KERN_DEBUG PFX "SPROM revision %d detected.\n", out->revision);
if ((bus->chip_id & 0xFF00) == 0x4400) {
/* Workaround: The BCM44XX chip has a stupid revision
* number stored in the SPROM.
* Always extract r1. */
out->revision = 1;
sprom_extract_r123(out, in);
} else if (bus->chip_id == 0x4321) {
/* the BCM4328 has a chipid == 0x4321 and a rev 4 SPROM */
out->revision = 4;
sprom_extract_r4(out, in);
} else {
if (out->revision == 0)
goto unsupported;
if (out->revision >= 1 && out->revision <= 3) {
sprom_extract_r123(out, in);
}
if (out->revision == 4)
sprom_extract_r4(out, in);
if (out->revision >= 5)
goto unsupported;
}
if (out->boardflags_lo == 0xFFFF)
out->boardflags_lo = 0; /* per specs */
if (out->boardflags_hi == 0xFFFF)
out->boardflags_hi = 0; /* per specs */
return 0;
unsupported:
ssb_printk(KERN_WARNING PFX "Unsupported SPROM revision %d "
"detected. Will extract v1\n", out->revision);
sprom_extract_r123(out, in);
return 0;
}
static int ssb_pci_sprom_get(struct ssb_bus *bus,
struct ssb_sprom *sprom)
{
int err = -ENOMEM;
u16 *buf;
buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL);
if (!buf)
goto out;
bus->sprom_size = SSB_SPROMSIZE_WORDS_R123;
sprom_do_read(bus, buf);
err = sprom_check_crc(buf, bus->sprom_size);
if (err) {
/* check for rev 4 sprom - has special signature */
if (buf[32] == 0x5372) {
kfree(buf);
buf = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16),
GFP_KERNEL);
if (!buf)
goto out;
bus->sprom_size = SSB_SPROMSIZE_WORDS_R4;
sprom_do_read(bus, buf);
err = sprom_check_crc(buf, bus->sprom_size);
}
if (err)
ssb_printk(KERN_WARNING PFX "WARNING: Invalid"
" SPROM CRC (corrupt SPROM)\n");
}
err = sprom_extract(bus, sprom, buf, bus->sprom_size);
kfree(buf);
out:
return err;
}
static void ssb_pci_get_boardinfo(struct ssb_bus *bus,
struct ssb_boardinfo *bi)
{
pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_VENDOR_ID,
&bi->vendor);
pci_read_config_word(bus->host_pci, PCI_SUBSYSTEM_ID,
&bi->type);
pci_read_config_word(bus->host_pci, PCI_REVISION_ID,
&bi->rev);
}
int ssb_pci_get_invariants(struct ssb_bus *bus,
struct ssb_init_invariants *iv)
{
int err;
err = ssb_pci_sprom_get(bus, &iv->sprom);
if (err)
goto out;
ssb_pci_get_boardinfo(bus, &iv->boardinfo);
out:
return err;
}
#ifdef CONFIG_SSB_DEBUG
static int ssb_pci_assert_buspower(struct ssb_bus *bus)
{
if (likely(bus->powered_up))
return 0;
printk(KERN_ERR PFX "FATAL ERROR: Bus powered down "
"while accessing PCI MMIO space\n");
if (bus->power_warn_count <= 10) {
bus->power_warn_count++;
dump_stack();
}
return -ENODEV;
}
#else /* DEBUG */
static inline int ssb_pci_assert_buspower(struct ssb_bus *bus)
{
return 0;
}
#endif /* DEBUG */
static u8 ssb_pci_read8(struct ssb_device *dev, u16 offset)
{
struct ssb_bus *bus = dev->bus;
if (unlikely(ssb_pci_assert_buspower(bus)))
return 0xFF;
if (unlikely(bus->mapped_device != dev)) {
if (unlikely(ssb_pci_switch_core(bus, dev)))
return 0xFF;
}
return ioread8(bus->mmio + offset);
}
static u16 ssb_pci_read16(struct ssb_device *dev, u16 offset)
{
struct ssb_bus *bus = dev->bus;
if (unlikely(ssb_pci_assert_buspower(bus)))
return 0xFFFF;
if (unlikely(bus->mapped_device != dev)) {
if (unlikely(ssb_pci_switch_core(bus, dev)))
return 0xFFFF;
}
return ioread16(bus->mmio + offset);
}
static u32 ssb_pci_read32(struct ssb_device *dev, u16 offset)
{
struct ssb_bus *bus = dev->bus;
if (unlikely(ssb_pci_assert_buspower(bus)))
return 0xFFFFFFFF;
if (unlikely(bus->mapped_device != dev)) {
if (unlikely(ssb_pci_switch_core(bus, dev)))
return 0xFFFFFFFF;
}
return ioread32(bus->mmio + offset);
}
#ifdef CONFIG_SSB_BLOCKIO
static void ssb_pci_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 = bus->mmio + offset;
if (unlikely(ssb_pci_assert_buspower(bus)))
goto error;
if (unlikely(bus->mapped_device != dev)) {
if (unlikely(ssb_pci_switch_core(bus, dev)))
goto error;
}
switch (reg_width) {
case sizeof(u8):
ioread8_rep(addr, buffer, count);
break;
case sizeof(u16):
SSB_WARN_ON(count & 1);
ioread16_rep(addr, buffer, count >> 1);
break;
case sizeof(u32):
SSB_WARN_ON(count & 3);
ioread32_rep(addr, buffer, count >> 2);
break;
default:
SSB_WARN_ON(1);
}
return;
error:
memset(buffer, 0xFF, count);
}
#endif /* CONFIG_SSB_BLOCKIO */
static void ssb_pci_write8(struct ssb_device *dev, u16 offset, u8 value)
{
struct ssb_bus *bus = dev->bus;
if (unlikely(ssb_pci_assert_buspower(bus)))
return;
if (unlikely(bus->mapped_device != dev)) {
if (unlikely(ssb_pci_switch_core(bus, dev)))
return;
}
iowrite8(value, bus->mmio + offset);
}
static void ssb_pci_write16(struct ssb_device *dev, u16 offset, u16 value)
{
struct ssb_bus *bus = dev->bus;
if (unlikely(ssb_pci_assert_buspower(bus)))
return;
if (unlikely(bus->mapped_device != dev)) {
if (unlikely(ssb_pci_switch_core(bus, dev)))
return;
}
iowrite16(value, bus->mmio + offset);
}
static void ssb_pci_write32(struct ssb_device *dev, u16 offset, u32 value)
{
struct ssb_bus *bus = dev->bus;
if (unlikely(ssb_pci_assert_buspower(bus)))
return;
if (unlikely(bus->mapped_device != dev)) {
if (unlikely(ssb_pci_switch_core(bus, dev)))
return;
}
iowrite32(value, bus->mmio + offset);
}
#ifdef CONFIG_SSB_BLOCKIO
static void ssb_pci_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 = bus->mmio + offset;
if (unlikely(ssb_pci_assert_buspower(bus)))
return;
if (unlikely(bus->mapped_device != dev)) {
if (unlikely(ssb_pci_switch_core(bus, dev)))
return;
}
switch (reg_width) {
case sizeof(u8):
iowrite8_rep(addr, buffer, count);
break;
case sizeof(u16):
SSB_WARN_ON(count & 1);
iowrite16_rep(addr, buffer, count >> 1);
break;
case sizeof(u32):
SSB_WARN_ON(count & 3);
iowrite32_rep(addr, buffer, count >> 2);
break;
default:
SSB_WARN_ON(1);
}
}
#endif /* CONFIG_SSB_BLOCKIO */
/* Not "static", as it's used in main.c */
const struct ssb_bus_ops ssb_pci_ops = {
.read8 = ssb_pci_read8,
.read16 = ssb_pci_read16,
.read32 = ssb_pci_read32,
.write8 = ssb_pci_write8,
.write16 = ssb_pci_write16,
.write32 = ssb_pci_write32,
#ifdef CONFIG_SSB_BLOCKIO
.block_read = ssb_pci_block_read,
.block_write = ssb_pci_block_write,
#endif
};
static ssize_t ssb_pci_attr_sprom_show(struct device *pcidev,
struct device_attribute *attr,
char *buf)
{
struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
struct ssb_bus *bus;
bus = ssb_pci_dev_to_bus(pdev);
if (!bus)
return -ENODEV;
return ssb_attr_sprom_show(bus, buf, sprom_do_read);
}
static ssize_t ssb_pci_attr_sprom_store(struct device *pcidev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct pci_dev *pdev = container_of(pcidev, struct pci_dev, dev);
struct ssb_bus *bus;
bus = ssb_pci_dev_to_bus(pdev);
if (!bus)
return -ENODEV;
return ssb_attr_sprom_store(bus, buf, count,
sprom_check_crc, sprom_do_write);
}
static DEVICE_ATTR(ssb_sprom, 0600,
ssb_pci_attr_sprom_show,
ssb_pci_attr_sprom_store);
void ssb_pci_exit(struct ssb_bus *bus)
{
struct pci_dev *pdev;
if (bus->bustype != SSB_BUSTYPE_PCI)
return;
pdev = bus->host_pci;
device_remove_file(&pdev->dev, &dev_attr_ssb_sprom);
}
int ssb_pci_init(struct ssb_bus *bus)
{
struct pci_dev *pdev;
int err;
if (bus->bustype != SSB_BUSTYPE_PCI)
return 0;
pdev = bus->host_pci;
mutex_init(&bus->sprom_mutex);
err = device_create_file(&pdev->dev, &dev_attr_ssb_sprom);
if (err)
goto out;
out:
return err;
}