/*-
* Copyright (c) 2016-2017 Ilya Bakulin
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Copyright (c) 2010 Broadcom Corporation
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/cdefs.h>
#include <sys/ioctl.h>
#include <sys/stdint.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/endian.h>
#include <sys/sbuf.h>
#include <sys/mman.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <inttypes.h>
#include <limits.h>
#include <fcntl.h>
#include <ctype.h>
#include <err.h>
#include <libutil.h>
#include <unistd.h>
#include <cam/cam.h>
#include <cam/cam_debug.h>
#include <cam/cam_ccb.h>
#include <cam/mmc/mmc_all.h>
#include <camlib.h>
#include "linux_compat.h"
#include "linux_sdio_compat.h"
#include "cam_sdio.h"
#include "brcmfmac_sdio.h"
#include "brcmfmac_bus.h"
static void probe_bcrm(struct cam_device *dev);
/*
* How Linux driver works
*
* The probing begins by calling brcmf_ops_sdio_probe() which is defined as probe function in struct sdio_driver. http://lxr.free-electrons.com/source/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c#L1126
*
* The driver does black magic by copying func struct for F2 and setting func number to zero there, to create an F0 func structure :)
* Driver state changes to BRCMF_SDIOD_DOWN.
* ops_sdio_probe() then calls brcmf_sdio_probe() -- at this point it has filled in sdiodev struct with the pointers to all three functions (F0, F1, F2).
*
* brcmf_sdiod_probe() sets block sizes for F1 and F2. It sets F1 block size to 64 and F2 to 512, not consulting the values stored in SDIO CCCR / FBR registers!
* Then it increases timeout for F2 (what is this?!)
* Then it enables F1
* Then it attaches "freezer" (without PM this is NOP)
* Finally it calls brcmf_sdio_probe() http://lxr.free-electrons.com/source/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c#L4082
*
* Here high-level workqueues and sg tables are allocated.
* It then calls brcmf_sdio_probe_attach()
*
* Here at the beginning there is a pr_debug() call with brcmf_sdiod_regrl() inside to addr #define SI_ENUM_BASE 0x18000000.
* Return value is 0x16044330.
* Then turns off PLL: byte-write BRCMF_INIT_CLKCTL1 (0x28) -> SBSDIO_FUNC1_CHIPCLKCSR (0x1000E)
* Then it reads value back, should be 0xe8.
* Then calls brcmf_chip_attach()
*
* http://lxr.free-electrons.com/source/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c#L1054
* This func enumerates and resets all the cores on the dongle.
* - brcmf_sdio_buscoreprep(): force clock to ALPAvail req only:
* SBSDIO_FORCE_HW_CLKREQ_OFF | SBSDIO_ALP_AVAIL_REQ -> SBSDIO_FUNC1_CHIPCLKCSR
* Wait up to 15ms to !SBSDIO_ALPAV(clkval) of the value from CLKCSR.
* Force ALP:
* SBSDIO_FORCE_HW_CLKREQ_OFF | SBSDIO_FORCE_ALP (0x21)-> SBSDIO_FUNC1_CHIPCLKCSR
* Disaable SDIO pullups:
* byte 0 -> SBSDIO_FUNC1_SDIOPULLUP (0x0001000f)
*
* Calls brcmf_chip_recognition()
* http://lxr.free-electrons.com/source/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c#L908
* Read 0x18000000. Get 0x16044330: chip 4330 rev 4
* AXI chip, call brcmf_chip_dmp_erom_scan() to get info about all cores.
* Then brcmf_chip_cores_check() to check that CPU and RAM are found,
*
* Setting cores to passive: not clear which of CR4/CA7/CM3 our chip has.
* Quite a few r/w calls to different parts of the chip to reset cores....
* Finally get_raminfo() called to fill in RAM info:
* brcmf_chip_get_raminfo: RAM: base=0x0 size=294912 (0x48000) sr=0 (0x0)
* http://lxr.free-electrons.com/source/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c#L700
*
* Then brcmf_chip_setup() is called, this prints and fills in chipcommon rev and PMU caps:
* brcmf_chip_setup: ccrev=39, pmurev=12, pmucaps=0x19583c0c
* http://lxr.free-electrons.com/source/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c#L1015
* Bus-specific setup code is NOP for SDIO.
*
* brcmf_sdio_kso_init() is called.
* Here it first reads 0x1 from SBSDIO_FUNC1_SLEEPCSR 0x18000650 and then writes it back... WTF?
*
* brcmf_sdio_drivestrengthinit() is called
* http://lxr.free-electrons.com/source/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c#L3630
*
* Set card control so an SDIO card reset does a WLAN backplane reset
* set PMUControl so a backplane reset does PMU state reload
* === end of brcmf_sdio_probe_attach ===
**** Finished reading at http://lxr.free-electrons.com/source/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c#L4152, line 2025 in the dump
* === How register reading works ===
* http://lxr.free-electrons.com/source/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c#L357
* The address to read from is written to three byte-sized registers of F1:
* - SBSDIO_FUNC1_SBADDRLOW 0x1000A
* - SBSDIO_FUNC1_SBADDRMID 0x1000B
* - SBSDIO_FUNC1_SBADDRHIGH 0x1000C
* If this is 32-bit read , a flag is set. The address is ANDed with SBSDIO_SB_OFT_ADDR_MASK which is 0x07FFF.
* Then brcmf_sdiod_regrw_helper() is called to read the reply.
* http://lxr.free-electrons.com/source/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c#L306
* Based on the address it figures out where to read it from (CCCR / FBR in F0, or somewhere in F1).
* Reads are retried three times.
* 1-byte IO is done with CMD52, more is read with CMD53 with address increment (not FIFO mode).
* http://lxr.free-electrons.com/source/drivers/mmc/core/sdio_io.c#L458
* ==================================
*
*
*/
/* BRCM-specific functions */
#define SDIOH_API_ACCESS_RETRY_LIMIT 2
#define SI_ENUM_BASE 0x18000000
#define REPLY_MAGIC 0x16044330
#define brcmf_err(fmt, ...) brcmf_dbg(0, fmt, ##__VA_ARGS__)
#define brcmf_dbg(level, fmt, ...) printf(fmt, ##__VA_ARGS__)
struct brcmf_sdio_dev {
struct cam_device *cam_dev;
u32 sbwad; /* Save backplane window address */
struct brcmf_bus *bus_if;
enum brcmf_sdiod_state state;
struct sdio_func *func[8];
};
void brcmf_bus_change_state(struct brcmf_bus *bus, enum brcmf_bus_state state);
void brcmf_sdiod_change_state(struct brcmf_sdio_dev *sdiodev,
enum brcmf_sdiod_state state);
static int brcmf_sdiod_request_data(struct brcmf_sdio_dev *sdiodev, u8 fn, u32 addr,
u8 regsz, void *data, bool write);
static int brcmf_sdiod_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address);
static int brcmf_sdiod_addrprep(struct brcmf_sdio_dev *sdiodev, uint width, u32 *addr);
u32 brcmf_sdiod_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret);
static void bailout(int ret);
static void
bailout(int ret) {
if (ret == 0)
return;
errx(1, "Operation returned error %d", ret);
}
void
brcmf_bus_change_state(struct brcmf_bus *bus, enum brcmf_bus_state state)
{
bus->state = state;
}
void brcmf_sdiod_change_state(struct brcmf_sdio_dev *sdiodev,
enum brcmf_sdiod_state state)
{
if (sdiodev->state == BRCMF_SDIOD_NOMEDIUM ||
state == sdiodev->state)
return;
//brcmf_dbg(TRACE, "%d -> %d\n", sdiodev->state, state);
switch (sdiodev->state) {
case BRCMF_SDIOD_DATA:
/* any other state means bus interface is down */
brcmf_bus_change_state(sdiodev->bus_if, BRCMF_BUS_DOWN);
break;
case BRCMF_SDIOD_DOWN:
/* transition from DOWN to DATA means bus interface is up */
if (state == BRCMF_SDIOD_DATA)
brcmf_bus_change_state(sdiodev->bus_if, BRCMF_BUS_UP);
break;
default:
break;
}
sdiodev->state = state;
}
static inline int brcmf_sdiod_f0_writeb(struct sdio_func *func,
uint regaddr, u8 byte) {
int err_ret;
/*
* Can only directly write to some F0 registers.
* Handle CCCR_IENx and CCCR_ABORT command
* as a special case.
*/
if ((regaddr == SDIO_CCCR_ABORT) ||
(regaddr == SDIO_CCCR_IENx))
sdio_writeb(func, byte, regaddr, &err_ret);
else
sdio_f0_writeb(func, byte, regaddr, &err_ret);
return err_ret;
}
static int brcmf_sdiod_request_data(struct brcmf_sdio_dev *sdiodev, u8 fn, u32 addr, u8 regsz, void *data, bool write)
{
struct sdio_func *func;
int ret = -EINVAL;
brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x, nbytes=%d\n",
write, fn, addr, regsz);
/* only allow byte access on F0 */
if (WARN_ON(regsz > 1 && !fn))
return -EINVAL;
func = sdiodev->func[fn];
switch (regsz) {
case sizeof(u8):
if (write) {
if (fn)
sdio_writeb(func, *(u8 *)data, addr, &ret);
else
ret = brcmf_sdiod_f0_writeb(func, addr,
*(u8 *)data);
} else {
if (fn)
*(u8 *)data = sdio_readb(func, addr, &ret);
else
*(u8 *)data = sdio_f0_readb(func, addr, &ret);
}
break;
case sizeof(u16):
if (write)
sdio_writew(func, *(u16 *)data, addr, &ret);
else
*(u16 *)data = sdio_readw(func, addr, &ret);
break;
case sizeof(u32):
if (write)
sdio_writel(func, *(u32 *)data, addr, &ret);
else
*(u32 *)data = sdio_readl(func, addr, &ret);
break;
default:
brcmf_err("invalid size: %d\n", regsz);
break;
}
if (ret)
brcmf_dbg(SDIO, "failed to %s data F%d@0x%05x, err: %d\n",
write ? "write" : "read", fn, addr, ret);
return ret;
}
static int
brcmf_sdiod_addrprep(struct brcmf_sdio_dev *sdiodev, uint width, u32 *addr)
{
uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
int err = 0;
if (bar0 != sdiodev->sbwad) {
err = brcmf_sdiod_set_sbaddr_window(sdiodev, bar0);
if (err)
return err;
sdiodev->sbwad = bar0;
}
*addr &= SBSDIO_SB_OFT_ADDR_MASK;
if (width == 4)
*addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
return 0;
}
static int brcmf_sdiod_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr, u8 regsz, void *data, bool write) {
u8 func;
s32 retry = 0;
int ret;
if (sdiodev->state == BRCMF_SDIOD_NOMEDIUM)
return -ENOMEDIUM;
/*
* figure out how to read the register based on address range
* 0x00 ~ 0x7FF: function 0 CCCR and FBR
* 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
* The rest: function 1 silicon backplane core registers
*/
if ((addr & ~REG_F0_REG_MASK) == 0)
func = SDIO_FUNC_0;
else
func = SDIO_FUNC_1;
do {
if (!write)
memset(data, 0, regsz);
/* for retry wait for 1 ms till bus get settled down */
if (retry)
usleep_range(1000, 2000);
ret = brcmf_sdiod_request_data(sdiodev, func, addr, regsz,
data, write);
} while (ret != 0 && ret != -ENOMEDIUM &&
retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
if (ret == -ENOMEDIUM)
brcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM);
else if (ret != 0) {
/*
* SleepCSR register access can fail when
* waking up the device so reduce this noise
* in the logs.
*/
if (addr != SBSDIO_FUNC1_SLEEPCSR)
brcmf_err("failed to %s data F%d@0x%05x, err: %d\n",
write ? "write" : "read", func, addr, ret);
else
brcmf_dbg(SDIO, "failed to %s data F%d@0x%05x, err: %d\n",
write ? "write" : "read", func, addr, ret);
}
return ret;
}
static int
brcmf_sdiod_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
{
int err = 0, i;
u8 addr[3];
if (sdiodev->state == BRCMF_SDIOD_NOMEDIUM)
return -ENOMEDIUM;
addr[0] = (address >> 8) & SBSDIO_SBADDRLOW_MASK;
addr[1] = (address >> 16) & SBSDIO_SBADDRMID_MASK;
addr[2] = (address >> 24) & SBSDIO_SBADDRHIGH_MASK;
for (i = 0; i < 3; i++) {
err = brcmf_sdiod_regrw_helper(sdiodev,
SBSDIO_FUNC1_SBADDRLOW + i,
sizeof(u8), &addr[i], true);
if (err) {
brcmf_err("failed at addr: 0x%0x\n",
SBSDIO_FUNC1_SBADDRLOW + i);
break;
}
}
return err;
}
u32 brcmf_sdiod_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
{
u32 data = 0;
int retval;
brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
retval = brcmf_sdiod_addrprep(sdiodev, sizeof(data), &addr);
if (retval)
goto done;
retval = brcmf_sdiod_regrw_helper(sdiodev, addr, sizeof(data), &data,
false);
brcmf_dbg(SDIO, "data:0x%08x\n", data);
done:
if (ret)
*ret = retval;
return data;
}
/********************************************************/
__unused
static void
probe_bcrm(struct cam_device *dev) {
uint32_t cis_addr;
struct cis_info info;
sdio_card_set_bus_width(dev, bus_width_4);
cis_addr = sdio_get_common_cis_addr(dev);
printf("CIS address: %04X\n", cis_addr);
memset(&info, 0, sizeof(info));
sdio_func_read_cis(dev, 0, cis_addr, &info);
printf("Vendor 0x%04X product 0x%04X\n", info.man_id, info.prod_id);
}
__unused static uint8_t*
mmap_fw() {
const char fw_path[] = "/home/kibab/repos/fbsd-bbb/brcm-firmware/brcmfmac4330-sdio.bin";
struct stat sb;
uint8_t *fw_ptr;
int fd = open(fw_path, O_RDONLY);
if (fd < 0)
errx(1, "Cannot open firmware file");
if (fstat(fd, &sb) < 0)
errx(1, "Cannot get file stat");
fw_ptr = mmap(NULL, sb.st_size, PROT_READ, 0, fd, 0);
if (fw_ptr == MAP_FAILED)
errx(1, "Cannot map the file");
return fw_ptr;
}
static void
usage() {
printf("sdiotool -u <pass_dev_unit>\n");
exit(0);
}
struct card_info {
uint8_t num_funcs;
struct cis_info f[8];
};
/*
* TODO: We should add SDIO card info about at least number of
* available functions to struct cam_device and use it instead
* of checking for man_id = 0x00 for detecting number of functions
*/
static void
get_sdio_card_info(struct cam_device *dev, struct card_info *ci) {
uint32_t cis_addr;
uint32_t fbr_addr;
int ret;
cis_addr = sdio_get_common_cis_addr(dev);
memset(ci, 0, sizeof(struct card_info));
sdio_func_read_cis(dev, 0, cis_addr, &ci->f[0]);
printf("F0: Vendor 0x%04X product 0x%04X max block size %d bytes\n",
ci->f[0].man_id, ci->f[0].prod_id, ci->f[0].max_block_size);
for (int i = 1; i <= 7; i++) {
fbr_addr = SD_IO_FBR_START * i + 0x9;
cis_addr = sdio_read_1(dev, 0, fbr_addr++, &ret);bailout(ret);
cis_addr |= sdio_read_1(dev, 0, fbr_addr++, &ret) << 8;
cis_addr |= sdio_read_1(dev, 0, fbr_addr++, &ret) << 16;
sdio_func_read_cis(dev, i, cis_addr, &ci->f[i]);
printf("F%d: Vendor 0x%04X product 0x%04X max block size %d bytes\n",
i, ci->f[i].man_id, ci->f[i].prod_id, ci->f[i].max_block_size);
if (ci->f[i].man_id == 0) {
printf("F%d doesn't exist\n", i);
break;
}
ci->num_funcs++;
}
}
int
main(int argc, char **argv) {
char device[] = "pass";
int unit = 0;
int func = 0;
__unused uint8_t *fw_ptr;
int ch;
struct cam_device *cam_dev;
int ret;
struct card_info ci;
//fw_ptr = mmap_fw();
while ((ch = getopt(argc, argv, "fu:")) != -1) {
switch (ch) {
case 'u':
unit = (int) strtol(optarg, NULL, 10);
break;
case 'f':
func = (int) strtol(optarg, NULL, 10);
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
if ((cam_dev = cam_open_spec_device(device, unit, O_RDWR, NULL)) == NULL)
errx(1, "Cannot open device");
get_sdio_card_info(cam_dev, &ci);
/* For now, everything non-broadcom is out of the question */
if (ci.f[0].man_id != 0x02D0) {
printf("The card is not a Broadcom device\n");
exit(1);
}
/* Init structures */
struct brcmf_sdio_dev brcmf_dev;
struct brcmf_bus bus_if;
struct sdio_func f0, f1, f2;
bus_if.state = BRCMF_BUS_DOWN;
brcmf_dev.cam_dev = cam_dev;
brcmf_dev.bus_if = &bus_if;
brcmf_dev.state = BRCMF_SDIOD_DOWN;
/* Fill in functions */
brcmf_dev.func[0] = &f0;
brcmf_dev.func[1] = &f1;
brcmf_dev.func[2] = &f2;
brcmf_dev.func[0]->dev = brcmf_dev.func[1]->dev
= brcmf_dev.func[2]->dev = cam_dev;
brcmf_dev.func[0]->num = 0;
brcmf_dev.func[1]->num = 1;
brcmf_dev.func[2]->num = 2;
ret = sdio_func_enable(cam_dev, 1, 1);bailout(ret);
uint32_t magic = brcmf_sdiod_regrl(&brcmf_dev, 0x18000000, &ret);
printf("Magic = %08x\n", magic);
if (magic != REPLY_MAGIC) {
errx(1, "Reply magic is incorrect: expected %08x, got %08x",
REPLY_MAGIC, magic);
}
cam_close_spec_device(cam_dev);
}
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