diff options
Diffstat (limited to 'drivers/staging/cw1200/hwio.c')
-rw-r--r-- | drivers/staging/cw1200/hwio.c | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/drivers/staging/cw1200/hwio.c b/drivers/staging/cw1200/hwio.c new file mode 100644 index 00000000000..b544a0a4a80 --- /dev/null +++ b/drivers/staging/cw1200/hwio.c @@ -0,0 +1,287 @@ +/* + * Low-level device IO routines for ST-Ericsson CW1200 drivers + * + * Copyright (c) 2010, ST-Ericsson + * Author: Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com> + * + * Based on: + * ST-Ericsson UMAC CW1200 driver, which is + * Copyright (c) 2010, ST-Ericsson + * Author: Ajitpal Singh <ajitpal.singh@stericsson.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/types.h> + +#include "cw1200.h" +#include "hwio.h" +#include "sbus.h" + + /* Sdio addr is 4*spi_addr */ +#define SPI_REG_ADDR_TO_SDIO(spi_reg_addr) ((spi_reg_addr) << 2) +#define SDIO_ADDR17BIT(buf_id, mpf, rfu, reg_id_ofs) \ + ((((buf_id) & 0x1F) << 7) \ + | (((mpf) & 1) << 6) \ + | (((rfu) & 1) << 5) \ + | (((reg_id_ofs) & 0x1F) << 0)) +#define MAX_RETRY 3 + + +static int __cw1200_reg_read(struct cw1200_common *priv, u16 addr, + void *buf, size_t buf_len, int buf_id) +{ + u16 addr_sdio; + u32 sdio_reg_addr_17bit ; + + /* Check if buffer is aligned to 4 byte boundary */ + if (WARN_ON(((unsigned long)buf & 3) && (buf_len > 4))) { + cw1200_dbg(CW1200_DBG_ERROR, + "%s: buffer is not aligned.\n", __func__); + return -EINVAL; + } + + /* Convert to SDIO Register Address */ + addr_sdio = SPI_REG_ADDR_TO_SDIO(addr); + sdio_reg_addr_17bit = SDIO_ADDR17BIT(buf_id, 0, 0, addr_sdio); + + BUG_ON(!priv->sbus_ops); + return priv->sbus_ops->sbus_memcpy_fromio(priv->sbus_priv, + sdio_reg_addr_17bit, + buf, buf_len); +} + +static int __cw1200_reg_write(struct cw1200_common *priv, u16 addr, + const void *buf, size_t buf_len, int buf_id) +{ + u16 addr_sdio; + u32 sdio_reg_addr_17bit ; + +#if 0 + /* Check if buffer is aligned to 4 byte boundary */ + if (WARN_ON(((unsigned long)buf & 3) && (buf_len > 4))) { + cw1200_dbg(CW1200_DBG_ERROR, "%s: buffer is not aligned.\n", + __func__); + return -EINVAL; + } +#endif + + /* Convert to SDIO Register Address */ + addr_sdio = SPI_REG_ADDR_TO_SDIO(addr); + sdio_reg_addr_17bit = SDIO_ADDR17BIT(buf_id, 0, 0, addr_sdio); + + BUG_ON(!priv->sbus_ops); + return priv->sbus_ops->sbus_memcpy_toio(priv->sbus_priv, + sdio_reg_addr_17bit, + buf, buf_len); +} + +static inline int __cw1200_reg_read_32(struct cw1200_common *priv, + u16 addr, u32 *val) +{ + return __cw1200_reg_read(priv, addr, val, sizeof(val), 0); +} + +static inline int __cw1200_reg_write_32(struct cw1200_common *priv, + u16 addr, u32 val) +{ + return __cw1200_reg_write(priv, addr, &val, sizeof(val), 0); +} + +int cw1200_reg_read(struct cw1200_common *priv, u16 addr, void *buf, + size_t buf_len) +{ + int ret; + BUG_ON(!priv->sbus_ops); + priv->sbus_ops->lock(priv->sbus_priv); + ret = __cw1200_reg_read(priv, addr, buf, buf_len, 0); + priv->sbus_ops->unlock(priv->sbus_priv); + return ret; +} + +int cw1200_reg_write(struct cw1200_common *priv, u16 addr, const void *buf, + size_t buf_len) +{ + int ret; + BUG_ON(!priv->sbus_ops); + priv->sbus_ops->lock(priv->sbus_priv); + ret = __cw1200_reg_write(priv, addr, buf, buf_len, 0); + priv->sbus_ops->unlock(priv->sbus_priv); + return ret; +} + +int cw1200_data_read(struct cw1200_common *priv, void *buf, size_t buf_len) +{ + int ret, retry = 1; + BUG_ON(!priv->sbus_ops); + priv->sbus_ops->lock(priv->sbus_priv); + { + int buf_id_rx = priv->buf_id_rx; + while (retry <= MAX_RETRY) { + ret = __cw1200_reg_read(priv, + ST90TDS_IN_OUT_QUEUE_REG_ID, buf, + buf_len, buf_id_rx + 1); + if (!ret) { + buf_id_rx = (buf_id_rx + 1) & 3; + priv->buf_id_rx = buf_id_rx; + break; + } else { + retry++; + mdelay(1); + cw1200_dbg(CW1200_DBG_ERROR, "%s,error :[%d]\n", + __func__, ret); + } + } + } + priv->sbus_ops->unlock(priv->sbus_priv); + return ret; +} + +int cw1200_data_write(struct cw1200_common *priv, const void *buf, + size_t buf_len) +{ + int ret, retry = 1; + BUG_ON(!priv->sbus_ops); + priv->sbus_ops->lock(priv->sbus_priv); + { + int buf_id_tx = priv->buf_id_tx; + while (retry <= MAX_RETRY) { + ret = __cw1200_reg_write(priv, + ST90TDS_IN_OUT_QUEUE_REG_ID, buf, + buf_len, buf_id_tx); + if (!ret) { + buf_id_tx = (buf_id_tx + 1) & 31; + priv->buf_id_tx = buf_id_tx; + break; + } else { + retry++; + mdelay(1); + cw1200_dbg(CW1200_DBG_ERROR, "%s,error :[%d]\n", + __func__, ret); + } + } + } + priv->sbus_ops->unlock(priv->sbus_priv); + return ret; +} + +int cw1200_indirect_read(struct cw1200_common *priv, u32 addr, void *buf, + size_t buf_len, u32 prefetch, u16 port_addr) +{ + u32 val32 = 0; + int i, ret; + + if ((buf_len / 2) >= 0x1000) { + cw1200_dbg(CW1200_DBG_ERROR, + "%s: Can't read more than 0xfff words.\n", + __func__); + WARN_ON(1); + return -EINVAL; + goto out; + } + + priv->sbus_ops->lock(priv->sbus_priv); + /* Write address */ + ret = __cw1200_reg_write_32(priv, ST90TDS_SRAM_BASE_ADDR_REG_ID, addr); + if (ret < 0) { + cw1200_dbg(CW1200_DBG_ERROR, + "%s: Can't write address register.\n", + __func__); + goto out; + } + + /* Read CONFIG Register Value - We will read 32 bits */ + ret = __cw1200_reg_read_32(priv, ST90TDS_CONFIG_REG_ID, &val32); + if (ret < 0) { + cw1200_dbg(CW1200_DBG_ERROR, + "%s: Can't read config register.\n", + __func__); + goto out; + } + + /* Set PREFETCH bit */ + ret = __cw1200_reg_write_32(priv, ST90TDS_CONFIG_REG_ID, + val32 | prefetch); + if (ret < 0) { + cw1200_dbg(CW1200_DBG_ERROR, + "%s: Can't write prefetch bit.\n", + __func__); + goto out; + } + + /* Check for PRE-FETCH bit to be cleared */ + for (i = 0; i < 20; i++) { + ret = __cw1200_reg_read_32(priv, ST90TDS_CONFIG_REG_ID, &val32); + if (ret < 0) { + cw1200_dbg(CW1200_DBG_ERROR, + "%s: Can't check prefetch bit.\n", + __func__); + goto out; + } + if (!(val32 & prefetch)) + break; + + mdelay(i); + } + + if (val32 & prefetch) { + cw1200_dbg(CW1200_DBG_ERROR, + "%s: Prefetch bit is not cleared.\n", + __func__); + goto out; + } + + /* Read data port */ + ret = __cw1200_reg_read(priv, port_addr, buf, buf_len, 0); + if (ret < 0) { + cw1200_dbg(CW1200_DBG_ERROR, + "%s: Can't read data port.\n", + __func__); + goto out; + } + +out: + priv->sbus_ops->unlock(priv->sbus_priv); + return ret; +} + +int cw1200_apb_write(struct cw1200_common *priv, u32 addr, const void *buf, + size_t buf_len) +{ + int ret; + + if ((buf_len / 2) >= 0x1000) { + cw1200_dbg(CW1200_DBG_ERROR, + "%s: Can't wrire more than 0xfff words.\n", + __func__); + WARN_ON(1); + return -EINVAL; + } + + priv->sbus_ops->lock(priv->sbus_priv); + + /* Write address */ + ret = __cw1200_reg_write_32(priv, ST90TDS_SRAM_BASE_ADDR_REG_ID, addr); + if (ret < 0) { + cw1200_dbg(CW1200_DBG_ERROR, + "%s: Can't write address register.\n", + __func__); + goto out; + } + + /* Write data port */ + ret = __cw1200_reg_write(priv, ST90TDS_SRAM_DPORT_REG_ID, + buf, buf_len, 0); + if (ret < 0) { + cw1200_dbg(CW1200_DBG_ERROR, "%s: Can't write data port.\n", + __func__); + goto out; + } + +out: + priv->sbus_ops->unlock(priv->sbus_priv); + return ret; +} + |