diff options
Diffstat (limited to 'drivers/staging/gdm72xx/gdm_sdio.c')
-rw-r--r-- | drivers/staging/gdm72xx/gdm_sdio.c | 700 |
1 files changed, 0 insertions, 700 deletions
diff --git a/drivers/staging/gdm72xx/gdm_sdio.c b/drivers/staging/gdm72xx/gdm_sdio.c deleted file mode 100644 index 1f5a087..0000000 --- a/drivers/staging/gdm72xx/gdm_sdio.c +++ /dev/null @@ -1,700 +0,0 @@ -/* - * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/kernel.h> - -#include <linux/mmc/core.h> -#include <linux/mmc/card.h> -#include <linux/mmc/sdio_func.h> -#include <linux/mmc/sdio_ids.h> - -#include "gdm_sdio.h" -#include "gdm_wimax.h" -#include "sdio_boot.h" -#include "hci.h" - -#define TYPE_A_HEADER_SIZE 4 -#define TYPE_A_LOOKAHEAD_SIZE 16 - -#define MAX_NR_RX_BUF 4 - -#define SDU_TX_BUF_SIZE 2048 -#define TX_BUF_SIZE 2048 -#define TX_CHUNK_SIZE (2048 - TYPE_A_HEADER_SIZE) -#define RX_BUF_SIZE (25*1024) - -#define TX_HZ 2000 -#define TX_INTERVAL (NSEC_PER_SEC/TX_HZ) - -static struct sdio_tx *alloc_tx_struct(struct tx_cxt *tx) -{ - struct sdio_tx *t = kzalloc(sizeof(*t), GFP_ATOMIC); - - if (!t) - return NULL; - - t->buf = kmalloc(TX_BUF_SIZE, GFP_ATOMIC); - if (!t->buf) { - kfree(t); - return NULL; - } - - t->tx_cxt = tx; - - return t; -} - -static void free_tx_struct(struct sdio_tx *t) -{ - if (t) { - kfree(t->buf); - kfree(t); - } -} - -static struct sdio_rx *alloc_rx_struct(struct rx_cxt *rx) -{ - struct sdio_rx *r = kzalloc(sizeof(*r), GFP_ATOMIC); - - if (r) - r->rx_cxt = rx; - - return r; -} - -static void free_rx_struct(struct sdio_rx *r) -{ - kfree(r); -} - -/* Before this function is called, spin lock should be locked. */ -static struct sdio_tx *get_tx_struct(struct tx_cxt *tx, int *no_spc) -{ - struct sdio_tx *t; - - if (list_empty(&tx->free_list)) - return NULL; - - t = list_entry(tx->free_list.prev, struct sdio_tx, list); - list_del(&t->list); - - *no_spc = list_empty(&tx->free_list) ? 1 : 0; - - return t; -} - -/* Before this function is called, spin lock should be locked. */ -static void put_tx_struct(struct tx_cxt *tx, struct sdio_tx *t) -{ - list_add_tail(&t->list, &tx->free_list); -} - -/* Before this function is called, spin lock should be locked. */ -static struct sdio_rx *get_rx_struct(struct rx_cxt *rx) -{ - struct sdio_rx *r; - - if (list_empty(&rx->free_list)) - return NULL; - - r = list_entry(rx->free_list.prev, struct sdio_rx, list); - list_del(&r->list); - - return r; -} - -/* Before this function is called, spin lock should be locked. */ -static void put_rx_struct(struct rx_cxt *rx, struct sdio_rx *r) -{ - list_add_tail(&r->list, &rx->free_list); -} - -static void release_sdio(struct sdiowm_dev *sdev) -{ - struct tx_cxt *tx = &sdev->tx; - struct rx_cxt *rx = &sdev->rx; - struct sdio_tx *t, *t_next; - struct sdio_rx *r, *r_next; - - kfree(tx->sdu_buf); - - list_for_each_entry_safe(t, t_next, &tx->free_list, list) { - list_del(&t->list); - free_tx_struct(t); - } - - list_for_each_entry_safe(t, t_next, &tx->sdu_list, list) { - list_del(&t->list); - free_tx_struct(t); - } - - list_for_each_entry_safe(t, t_next, &tx->hci_list, list) { - list_del(&t->list); - free_tx_struct(t); - } - - kfree(rx->rx_buf); - - list_for_each_entry_safe(r, r_next, &rx->free_list, list) { - list_del(&r->list); - free_rx_struct(r); - } - - list_for_each_entry_safe(r, r_next, &rx->req_list, list) { - list_del(&r->list); - free_rx_struct(r); - } -} - -static int init_sdio(struct sdiowm_dev *sdev) -{ - int ret = 0, i; - struct tx_cxt *tx = &sdev->tx; - struct rx_cxt *rx = &sdev->rx; - struct sdio_tx *t; - struct sdio_rx *r; - - INIT_LIST_HEAD(&tx->free_list); - INIT_LIST_HEAD(&tx->sdu_list); - INIT_LIST_HEAD(&tx->hci_list); - - spin_lock_init(&tx->lock); - - tx->sdu_buf = kmalloc(SDU_TX_BUF_SIZE, GFP_KERNEL); - if (!tx->sdu_buf) - goto fail; - - for (i = 0; i < MAX_NR_SDU_BUF; i++) { - t = alloc_tx_struct(tx); - if (!t) { - ret = -ENOMEM; - goto fail; - } - list_add(&t->list, &tx->free_list); - } - - INIT_LIST_HEAD(&rx->free_list); - INIT_LIST_HEAD(&rx->req_list); - - spin_lock_init(&rx->lock); - - for (i = 0; i < MAX_NR_RX_BUF; i++) { - r = alloc_rx_struct(rx); - if (!r) { - ret = -ENOMEM; - goto fail; - } - list_add(&r->list, &rx->free_list); - } - - rx->rx_buf = kmalloc(RX_BUF_SIZE, GFP_KERNEL); - if (!rx->rx_buf) - goto fail; - - return 0; - -fail: - release_sdio(sdev); - return ret; -} - -static void send_sdio_pkt(struct sdio_func *func, u8 *data, int len) -{ - int n, blocks, ret, remain; - - sdio_claim_host(func); - - blocks = len / func->cur_blksize; - n = blocks * func->cur_blksize; - if (blocks) { - ret = sdio_memcpy_toio(func, 0, data, n); - if (ret < 0) { - if (ret != -ENOMEDIUM) - dev_err(&func->dev, - "gdmwms: error: ret = %d\n", ret); - goto end_io; - } - } - - remain = len - n; - remain = (remain + 3) & ~3; - - if (remain) { - ret = sdio_memcpy_toio(func, 0, data + n, remain); - if (ret < 0) { - if (ret != -ENOMEDIUM) - dev_err(&func->dev, - "gdmwms: error: ret = %d\n", ret); - goto end_io; - } - } - -end_io: - sdio_release_host(func); -} - -static void send_sdu(struct sdio_func *func, struct tx_cxt *tx) -{ - struct list_head *l, *next; - struct hci_s *hci; - struct sdio_tx *t; - int pos, len, i, estlen, aggr_num = 0, aggr_len; - u8 *buf; - unsigned long flags; - - spin_lock_irqsave(&tx->lock, flags); - - pos = TYPE_A_HEADER_SIZE + HCI_HEADER_SIZE; - list_for_each_entry(t, &tx->sdu_list, list) { - estlen = ((t->len + 3) & ~3) + 4; - if ((pos + estlen) > SDU_TX_BUF_SIZE) - break; - - aggr_num++; - memcpy(tx->sdu_buf + pos, t->buf, t->len); - memset(tx->sdu_buf + pos + t->len, 0, estlen - t->len); - pos += estlen; - } - aggr_len = pos; - - hci = (struct hci_s *)(tx->sdu_buf + TYPE_A_HEADER_SIZE); - hci->cmd_evt = cpu_to_be16(WIMAX_TX_SDU_AGGR); - hci->length = cpu_to_be16(aggr_len - TYPE_A_HEADER_SIZE - - HCI_HEADER_SIZE); - - spin_unlock_irqrestore(&tx->lock, flags); - - dev_dbg(&func->dev, "sdio_send: %*ph\n", aggr_len - TYPE_A_HEADER_SIZE, - tx->sdu_buf + TYPE_A_HEADER_SIZE); - - for (pos = TYPE_A_HEADER_SIZE; pos < aggr_len; pos += TX_CHUNK_SIZE) { - len = aggr_len - pos; - len = len > TX_CHUNK_SIZE ? TX_CHUNK_SIZE : len; - buf = tx->sdu_buf + pos - TYPE_A_HEADER_SIZE; - - buf[0] = len & 0xff; - buf[1] = (len >> 8) & 0xff; - buf[2] = (len >> 16) & 0xff; - buf[3] = (pos + len) >= aggr_len ? 0 : 1; - send_sdio_pkt(func, buf, len + TYPE_A_HEADER_SIZE); - } - - spin_lock_irqsave(&tx->lock, flags); - - for (l = tx->sdu_list.next, i = 0; i < aggr_num; i++, l = next) { - next = l->next; - t = list_entry(l, struct sdio_tx, list); - if (t->callback) - t->callback(t->cb_data); - - list_del(l); - put_tx_struct(t->tx_cxt, t); - } - - tx->sdu_stamp = ktime_get(); - spin_unlock_irqrestore(&tx->lock, flags); -} - -static void send_hci(struct sdio_func *func, struct tx_cxt *tx, - struct sdio_tx *t) -{ - unsigned long flags; - - dev_dbg(&func->dev, "sdio_send: %*ph\n", t->len - TYPE_A_HEADER_SIZE, - t->buf + TYPE_A_HEADER_SIZE); - - send_sdio_pkt(func, t->buf, t->len); - - spin_lock_irqsave(&tx->lock, flags); - if (t->callback) - t->callback(t->cb_data); - free_tx_struct(t); - spin_unlock_irqrestore(&tx->lock, flags); -} - -static void do_tx(struct work_struct *work) -{ - struct sdiowm_dev *sdev = container_of(work, struct sdiowm_dev, ws); - struct sdio_func *func = sdev->func; - struct tx_cxt *tx = &sdev->tx; - struct sdio_tx *t = NULL; - ktime_t now, before; - int is_sdu = 0; - long diff; - unsigned long flags; - - spin_lock_irqsave(&tx->lock, flags); - if (!tx->can_send) { - spin_unlock_irqrestore(&tx->lock, flags); - return; - } - - if (!list_empty(&tx->hci_list)) { - t = list_entry(tx->hci_list.next, struct sdio_tx, list); - list_del(&t->list); - is_sdu = 0; - } else if (!tx->stop_sdu_tx && !list_empty(&tx->sdu_list)) { - now = ktime_get(); - before = tx->sdu_stamp; - - diff = ktime_to_ns(ktime_sub(now, before)); - if (diff >= 0 && diff < TX_INTERVAL) { - schedule_work(&sdev->ws); - spin_unlock_irqrestore(&tx->lock, flags); - return; - } - is_sdu = 1; - } - - if (!is_sdu && !t) { - spin_unlock_irqrestore(&tx->lock, flags); - return; - } - - tx->can_send = 0; - - spin_unlock_irqrestore(&tx->lock, flags); - - if (is_sdu) - send_sdu(func, tx); - else - send_hci(func, tx, t); -} - -static int gdm_sdio_send(void *priv_dev, void *data, int len, - void (*cb)(void *data), void *cb_data) -{ - struct sdiowm_dev *sdev = priv_dev; - struct tx_cxt *tx = &sdev->tx; - struct sdio_tx *t; - u8 *pkt = data; - int no_spc = 0; - u16 cmd_evt; - unsigned long flags; - - if (len > TX_BUF_SIZE - TYPE_A_HEADER_SIZE) - return -EINVAL; - - spin_lock_irqsave(&tx->lock, flags); - - cmd_evt = (pkt[0] << 8) | pkt[1]; - if (cmd_evt == WIMAX_TX_SDU) { - t = get_tx_struct(tx, &no_spc); - if (!t) { - /* This case must not happen. */ - spin_unlock_irqrestore(&tx->lock, flags); - return -ENOSPC; - } - list_add_tail(&t->list, &tx->sdu_list); - - memcpy(t->buf, data, len); - - t->len = len; - t->callback = cb; - t->cb_data = cb_data; - } else { - t = alloc_tx_struct(tx); - if (!t) { - spin_unlock_irqrestore(&tx->lock, flags); - return -ENOMEM; - } - list_add_tail(&t->list, &tx->hci_list); - - t->buf[0] = len & 0xff; - t->buf[1] = (len >> 8) & 0xff; - t->buf[2] = (len >> 16) & 0xff; - t->buf[3] = 2; - memcpy(t->buf + TYPE_A_HEADER_SIZE, data, len); - - t->len = len + TYPE_A_HEADER_SIZE; - t->callback = cb; - t->cb_data = cb_data; - } - - if (tx->can_send) - schedule_work(&sdev->ws); - - spin_unlock_irqrestore(&tx->lock, flags); - - if (no_spc) - return -ENOSPC; - - return 0; -} - -/* Handle the HCI, WIMAX_SDU_TX_FLOW. */ -static int control_sdu_tx_flow(struct sdiowm_dev *sdev, u8 *hci_data, int len) -{ - struct tx_cxt *tx = &sdev->tx; - u16 cmd_evt; - unsigned long flags; - - spin_lock_irqsave(&tx->lock, flags); - - cmd_evt = (hci_data[0] << 8) | (hci_data[1]); - if (cmd_evt != WIMAX_SDU_TX_FLOW) - goto out; - - if (hci_data[4] == 0) { - dev_dbg(&sdev->func->dev, "WIMAX ==> STOP SDU TX\n"); - tx->stop_sdu_tx = 1; - } else if (hci_data[4] == 1) { - dev_dbg(&sdev->func->dev, "WIMAX ==> START SDU TX\n"); - tx->stop_sdu_tx = 0; - if (tx->can_send) - schedule_work(&sdev->ws); - /* If free buffer for sdu tx doesn't exist, then tx queue - * should not be woken. For this reason, don't pass the command, - * START_SDU_TX. - */ - if (list_empty(&tx->free_list)) - len = 0; - } - -out: - spin_unlock_irqrestore(&tx->lock, flags); - return len; -} - -static void gdm_sdio_irq(struct sdio_func *func) -{ - struct phy_dev *phy_dev = sdio_get_drvdata(func); - struct sdiowm_dev *sdev = phy_dev->priv_dev; - struct tx_cxt *tx = &sdev->tx; - struct rx_cxt *rx = &sdev->rx; - struct sdio_rx *r; - unsigned long flags; - u8 val, hdr[TYPE_A_LOOKAHEAD_SIZE], *buf; - u32 len, blocks, n; - int ret, remain; - - /* Check interrupt */ - val = sdio_readb(func, 0x13, &ret); - if (val & 0x01) - sdio_writeb(func, 0x01, 0x13, &ret); /* clear interrupt */ - else - return; - - ret = sdio_memcpy_fromio(func, hdr, 0x0, TYPE_A_LOOKAHEAD_SIZE); - if (ret) { - dev_err(&func->dev, - "Cannot read from function %d\n", func->num); - goto done; - } - - len = (hdr[2] << 16) | (hdr[1] << 8) | hdr[0]; - if (len > (RX_BUF_SIZE - TYPE_A_HEADER_SIZE)) { - dev_err(&func->dev, "Too big Type-A size: %d\n", len); - goto done; - } - - if (hdr[3] == 1) { /* Ack */ - u32 *ack_seq = (u32 *)&hdr[4]; - - spin_lock_irqsave(&tx->lock, flags); - tx->can_send = 1; - - if (!list_empty(&tx->sdu_list) || !list_empty(&tx->hci_list)) - schedule_work(&sdev->ws); - spin_unlock_irqrestore(&tx->lock, flags); - dev_dbg(&func->dev, "Ack... %0x\n", ntohl(*ack_seq)); - goto done; - } - - memcpy(rx->rx_buf, hdr + TYPE_A_HEADER_SIZE, - TYPE_A_LOOKAHEAD_SIZE - TYPE_A_HEADER_SIZE); - - buf = rx->rx_buf + TYPE_A_LOOKAHEAD_SIZE - TYPE_A_HEADER_SIZE; - remain = len - TYPE_A_LOOKAHEAD_SIZE + TYPE_A_HEADER_SIZE; - if (remain <= 0) - goto end_io; - - blocks = remain / func->cur_blksize; - - if (blocks) { - n = blocks * func->cur_blksize; - ret = sdio_memcpy_fromio(func, buf, 0x0, n); - if (ret) { - dev_err(&func->dev, - "Cannot read from function %d\n", func->num); - goto done; - } - buf += n; - remain -= n; - } - - if (remain) { - ret = sdio_memcpy_fromio(func, buf, 0x0, remain); - if (ret) { - dev_err(&func->dev, - "Cannot read from function %d\n", func->num); - goto done; - } - } - -end_io: - dev_dbg(&func->dev, "sdio_receive: %*ph\n", len, rx->rx_buf); - - len = control_sdu_tx_flow(sdev, rx->rx_buf, len); - - spin_lock_irqsave(&rx->lock, flags); - - if (!list_empty(&rx->req_list)) { - r = list_entry(rx->req_list.next, struct sdio_rx, list); - spin_unlock_irqrestore(&rx->lock, flags); - if (r->callback) - r->callback(r->cb_data, rx->rx_buf, len); - spin_lock_irqsave(&rx->lock, flags); - list_del(&r->list); - put_rx_struct(rx, r); - } - - spin_unlock_irqrestore(&rx->lock, flags); - -done: - sdio_writeb(func, 0x00, 0x10, &ret); /* PCRRT */ - if (!phy_dev->netdev) - register_wimax_device(phy_dev, &func->dev); -} - -static int gdm_sdio_receive(void *priv_dev, - void (*cb)(void *cb_data, void *data, int len), - void *cb_data) -{ - struct sdiowm_dev *sdev = priv_dev; - struct rx_cxt *rx = &sdev->rx; - struct sdio_rx *r; - unsigned long flags; - - spin_lock_irqsave(&rx->lock, flags); - r = get_rx_struct(rx); - if (!r) { - spin_unlock_irqrestore(&rx->lock, flags); - return -ENOMEM; - } - - r->callback = cb; - r->cb_data = cb_data; - - list_add_tail(&r->list, &rx->req_list); - spin_unlock_irqrestore(&rx->lock, flags); - - return 0; -} - -static int sdio_wimax_probe(struct sdio_func *func, - const struct sdio_device_id *id) -{ - int ret; - struct phy_dev *phy_dev = NULL; - struct sdiowm_dev *sdev = NULL; - - dev_info(&func->dev, "Found GDM SDIO VID = 0x%04x PID = 0x%04x...\n", - func->vendor, func->device); - dev_info(&func->dev, "GCT WiMax driver version %s\n", DRIVER_VERSION); - - sdio_claim_host(func); - sdio_enable_func(func); - sdio_claim_irq(func, gdm_sdio_irq); - - ret = sdio_boot(func); - if (ret) - return ret; - - phy_dev = kzalloc(sizeof(*phy_dev), GFP_KERNEL); - if (!phy_dev) { - ret = -ENOMEM; - goto out; - } - sdev = kzalloc(sizeof(*sdev), GFP_KERNEL); - if (!sdev) { - ret = -ENOMEM; - goto out; - } - - phy_dev->priv_dev = (void *)sdev; - phy_dev->send_func = gdm_sdio_send; - phy_dev->rcv_func = gdm_sdio_receive; - - ret = init_sdio(sdev); - if (ret < 0) - goto out; - - sdev->func = func; - - sdio_writeb(func, 1, 0x14, &ret); /* Enable interrupt */ - sdio_release_host(func); - - INIT_WORK(&sdev->ws, do_tx); - - sdio_set_drvdata(func, phy_dev); -out: - if (ret) { - kfree(phy_dev); - kfree(sdev); - } - - return ret; -} - -static void sdio_wimax_remove(struct sdio_func *func) -{ - struct phy_dev *phy_dev = sdio_get_drvdata(func); - struct sdiowm_dev *sdev = phy_dev->priv_dev; - - cancel_work_sync(&sdev->ws); - if (phy_dev->netdev) - unregister_wimax_device(phy_dev); - sdio_claim_host(func); - sdio_release_irq(func); - sdio_disable_func(func); - sdio_release_host(func); - release_sdio(sdev); - - kfree(sdev); - kfree(phy_dev); -} - -static const struct sdio_device_id sdio_wimax_ids[] = { - { SDIO_DEVICE(0x0296, 0x5347) }, - {0} -}; - -MODULE_DEVICE_TABLE(sdio, sdio_wimax_ids); - -static struct sdio_driver sdio_wimax_driver = { - .probe = sdio_wimax_probe, - .remove = sdio_wimax_remove, - .name = "sdio_wimax", - .id_table = sdio_wimax_ids, -}; - -static int __init sdio_gdm_wimax_init(void) -{ - return sdio_register_driver(&sdio_wimax_driver); -} - -static void __exit sdio_gdm_wimax_exit(void) -{ - sdio_unregister_driver(&sdio_wimax_driver); -} - -module_init(sdio_gdm_wimax_init); -module_exit(sdio_gdm_wimax_exit); - -MODULE_VERSION(DRIVER_VERSION); -MODULE_DESCRIPTION("GCT WiMax SDIO Device Driver"); -MODULE_AUTHOR("Ethan Park"); -MODULE_LICENSE("GPL"); |