| /* |
| * Renesas USB driver |
| * |
| * Copyright (C) 2011 Renesas Solutions Corp. |
| * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> |
| * |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| * |
| */ |
| #include <linux/delay.h> |
| #include <linux/io.h> |
| #include <linux/scatterlist.h> |
| #include "./common.h" |
| #include "./pipe.h" |
| |
| #define usbhsf_get_cfifo(p) (&((p)->fifo_info.cfifo)) |
| #define usbhsf_get_d0fifo(p) (&((p)->fifo_info.d0fifo)) |
| #define usbhsf_get_d1fifo(p) (&((p)->fifo_info.d1fifo)) |
| |
| #define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */ |
| |
| /* |
| * packet initialize |
| */ |
| void usbhs_pkt_init(struct usbhs_pkt *pkt) |
| { |
| pkt->dma = DMA_ADDR_INVALID; |
| INIT_LIST_HEAD(&pkt->node); |
| } |
| |
| /* |
| * packet control function |
| */ |
| static int usbhsf_null_handle(struct usbhs_pkt *pkt, int *is_done) |
| { |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe); |
| struct device *dev = usbhs_priv_to_dev(priv); |
| |
| dev_err(dev, "null handler\n"); |
| |
| return -EINVAL; |
| } |
| |
| static struct usbhs_pkt_handle usbhsf_null_handler = { |
| .prepare = usbhsf_null_handle, |
| .try_run = usbhsf_null_handle, |
| }; |
| |
| void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt, |
| void (*done)(struct usbhs_priv *priv, |
| struct usbhs_pkt *pkt), |
| void *buf, int len, int zero, int sequence) |
| { |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| struct device *dev = usbhs_priv_to_dev(priv); |
| unsigned long flags; |
| |
| if (!done) { |
| dev_err(dev, "no done function\n"); |
| return; |
| } |
| |
| /******************** spin lock ********************/ |
| usbhs_lock(priv, flags); |
| |
| if (!pipe->handler) { |
| dev_err(dev, "no handler function\n"); |
| pipe->handler = &usbhsf_null_handler; |
| } |
| |
| list_del_init(&pkt->node); |
| list_add_tail(&pkt->node, &pipe->list); |
| |
| /* |
| * each pkt must hold own handler. |
| * because handler might be changed by its situation. |
| * dma handler -> pio handler. |
| */ |
| pkt->pipe = pipe; |
| pkt->buf = buf; |
| pkt->handler = pipe->handler; |
| pkt->length = len; |
| pkt->zero = zero; |
| pkt->actual = 0; |
| pkt->done = done; |
| pkt->sequence = sequence; |
| |
| usbhs_unlock(priv, flags); |
| /******************** spin unlock ******************/ |
| } |
| |
| static void __usbhsf_pkt_del(struct usbhs_pkt *pkt) |
| { |
| list_del_init(&pkt->node); |
| } |
| |
| static struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe) |
| { |
| if (list_empty(&pipe->list)) |
| return NULL; |
| |
| return list_entry(pipe->list.next, struct usbhs_pkt, node); |
| } |
| |
| struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt) |
| { |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| unsigned long flags; |
| |
| /******************** spin lock ********************/ |
| usbhs_lock(priv, flags); |
| |
| if (!pkt) |
| pkt = __usbhsf_pkt_get(pipe); |
| |
| if (pkt) |
| __usbhsf_pkt_del(pkt); |
| |
| usbhs_unlock(priv, flags); |
| /******************** spin unlock ******************/ |
| |
| return pkt; |
| } |
| |
| enum { |
| USBHSF_PKT_PREPARE, |
| USBHSF_PKT_TRY_RUN, |
| USBHSF_PKT_DMA_DONE, |
| }; |
| |
| static int usbhsf_pkt_handler(struct usbhs_pipe *pipe, int type) |
| { |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| struct usbhs_pkt *pkt; |
| struct device *dev = usbhs_priv_to_dev(priv); |
| int (*func)(struct usbhs_pkt *pkt, int *is_done); |
| unsigned long flags; |
| int ret = 0; |
| int is_done = 0; |
| |
| /******************** spin lock ********************/ |
| usbhs_lock(priv, flags); |
| |
| pkt = __usbhsf_pkt_get(pipe); |
| if (!pkt) |
| goto __usbhs_pkt_handler_end; |
| |
| switch (type) { |
| case USBHSF_PKT_PREPARE: |
| func = pkt->handler->prepare; |
| break; |
| case USBHSF_PKT_TRY_RUN: |
| func = pkt->handler->try_run; |
| break; |
| case USBHSF_PKT_DMA_DONE: |
| func = pkt->handler->dma_done; |
| break; |
| default: |
| dev_err(dev, "unknown pkt hander\n"); |
| goto __usbhs_pkt_handler_end; |
| } |
| |
| ret = func(pkt, &is_done); |
| |
| if (is_done) |
| __usbhsf_pkt_del(pkt); |
| |
| __usbhs_pkt_handler_end: |
| usbhs_unlock(priv, flags); |
| /******************** spin unlock ******************/ |
| |
| if (is_done) { |
| pkt->done(priv, pkt); |
| usbhs_pkt_start(pipe); |
| } |
| |
| return ret; |
| } |
| |
| void usbhs_pkt_start(struct usbhs_pipe *pipe) |
| { |
| usbhsf_pkt_handler(pipe, USBHSF_PKT_PREPARE); |
| } |
| |
| /* |
| * irq enable/disable function |
| */ |
| #define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, bempsts, e) |
| #define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, brdysts, e) |
| #define usbhsf_irq_callback_ctrl(pipe, status, enable) \ |
| ({ \ |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); \ |
| struct usbhs_mod *mod = usbhs_mod_get_current(priv); \ |
| u16 status = (1 << usbhs_pipe_number(pipe)); \ |
| if (!mod) \ |
| return; \ |
| if (enable) \ |
| mod->irq_##status |= status; \ |
| else \ |
| mod->irq_##status &= ~status; \ |
| usbhs_irq_callback_update(priv, mod); \ |
| }) |
| |
| static void usbhsf_tx_irq_ctrl(struct usbhs_pipe *pipe, int enable) |
| { |
| /* |
| * And DCP pipe can NOT use "ready interrupt" for "send" |
| * it should use "empty" interrupt. |
| * see |
| * "Operation" - "Interrupt Function" - "BRDY Interrupt" |
| * |
| * on the other hand, normal pipe can use "ready interrupt" for "send" |
| * even though it is single/double buffer |
| */ |
| if (usbhs_pipe_is_dcp(pipe)) |
| usbhsf_irq_empty_ctrl(pipe, enable); |
| else |
| usbhsf_irq_ready_ctrl(pipe, enable); |
| } |
| |
| static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable) |
| { |
| usbhsf_irq_ready_ctrl(pipe, enable); |
| } |
| |
| /* |
| * FIFO ctrl |
| */ |
| static void usbhsf_send_terminator(struct usbhs_pipe *pipe, |
| struct usbhs_fifo *fifo) |
| { |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| |
| usbhs_bset(priv, fifo->ctr, BVAL, BVAL); |
| } |
| |
| static int usbhsf_fifo_barrier(struct usbhs_priv *priv, |
| struct usbhs_fifo *fifo) |
| { |
| int timeout = 1024; |
| |
| do { |
| /* The FIFO port is accessible */ |
| if (usbhs_read(priv, fifo->ctr) & FRDY) |
| return 0; |
| |
| udelay(10); |
| } while (timeout--); |
| |
| return -EBUSY; |
| } |
| |
| static void usbhsf_fifo_clear(struct usbhs_pipe *pipe, |
| struct usbhs_fifo *fifo) |
| { |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| |
| if (!usbhs_pipe_is_dcp(pipe)) |
| usbhsf_fifo_barrier(priv, fifo); |
| |
| usbhs_write(priv, fifo->ctr, BCLR); |
| } |
| |
| static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv, |
| struct usbhs_fifo *fifo) |
| { |
| return usbhs_read(priv, fifo->ctr) & DTLN_MASK; |
| } |
| |
| static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe, |
| struct usbhs_fifo *fifo) |
| { |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| |
| usbhs_pipe_select_fifo(pipe, NULL); |
| usbhs_write(priv, fifo->sel, 0); |
| } |
| |
| static int usbhsf_fifo_select(struct usbhs_pipe *pipe, |
| struct usbhs_fifo *fifo, |
| int write) |
| { |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| struct device *dev = usbhs_priv_to_dev(priv); |
| int timeout = 1024; |
| u16 mask = ((1 << 5) | 0xF); /* mask of ISEL | CURPIPE */ |
| u16 base = usbhs_pipe_number(pipe); /* CURPIPE */ |
| |
| if (usbhs_pipe_is_busy(pipe) || |
| usbhsf_fifo_is_busy(fifo)) |
| return -EBUSY; |
| |
| if (usbhs_pipe_is_dcp(pipe)) { |
| base |= (1 == write) << 5; /* ISEL */ |
| |
| if (usbhs_mod_is_host(priv)) |
| usbhs_dcp_dir_for_host(pipe, write); |
| } |
| |
| /* "base" will be used below */ |
| usbhs_write(priv, fifo->sel, base | MBW_32); |
| |
| /* check ISEL and CURPIPE value */ |
| while (timeout--) { |
| if (base == (mask & usbhs_read(priv, fifo->sel))) { |
| usbhs_pipe_select_fifo(pipe, fifo); |
| return 0; |
| } |
| udelay(10); |
| } |
| |
| dev_err(dev, "fifo select error\n"); |
| |
| return -EIO; |
| } |
| |
| /* |
| * DCP status stage |
| */ |
| static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt *pkt, int *is_done) |
| { |
| struct usbhs_pipe *pipe = pkt->pipe; |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ |
| struct device *dev = usbhs_priv_to_dev(priv); |
| int ret; |
| |
| usbhs_pipe_disable(pipe); |
| |
| ret = usbhsf_fifo_select(pipe, fifo, 1); |
| if (ret < 0) { |
| dev_err(dev, "%s() faile\n", __func__); |
| return ret; |
| } |
| |
| usbhs_pipe_sequence_data1(pipe); /* DATA1 */ |
| |
| usbhsf_fifo_clear(pipe, fifo); |
| usbhsf_send_terminator(pipe, fifo); |
| |
| usbhsf_fifo_unselect(pipe, fifo); |
| |
| usbhsf_tx_irq_ctrl(pipe, 1); |
| usbhs_pipe_enable(pipe); |
| |
| return ret; |
| } |
| |
| static int usbhs_dcp_dir_switch_to_read(struct usbhs_pkt *pkt, int *is_done) |
| { |
| struct usbhs_pipe *pipe = pkt->pipe; |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ |
| struct device *dev = usbhs_priv_to_dev(priv); |
| int ret; |
| |
| usbhs_pipe_disable(pipe); |
| |
| ret = usbhsf_fifo_select(pipe, fifo, 0); |
| if (ret < 0) { |
| dev_err(dev, "%s() fail\n", __func__); |
| return ret; |
| } |
| |
| usbhs_pipe_sequence_data1(pipe); /* DATA1 */ |
| usbhsf_fifo_clear(pipe, fifo); |
| |
| usbhsf_fifo_unselect(pipe, fifo); |
| |
| usbhsf_rx_irq_ctrl(pipe, 1); |
| usbhs_pipe_enable(pipe); |
| |
| return ret; |
| |
| } |
| |
| static int usbhs_dcp_dir_switch_done(struct usbhs_pkt *pkt, int *is_done) |
| { |
| struct usbhs_pipe *pipe = pkt->pipe; |
| |
| if (pkt->handler == &usbhs_dcp_status_stage_in_handler) |
| usbhsf_tx_irq_ctrl(pipe, 0); |
| else |
| usbhsf_rx_irq_ctrl(pipe, 0); |
| |
| pkt->actual = pkt->length; |
| *is_done = 1; |
| |
| return 0; |
| } |
| |
| struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler = { |
| .prepare = usbhs_dcp_dir_switch_to_write, |
| .try_run = usbhs_dcp_dir_switch_done, |
| }; |
| |
| struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler = { |
| .prepare = usbhs_dcp_dir_switch_to_read, |
| .try_run = usbhs_dcp_dir_switch_done, |
| }; |
| |
| /* |
| * DCP data stage (push) |
| */ |
| static int usbhsf_dcp_data_stage_try_push(struct usbhs_pkt *pkt, int *is_done) |
| { |
| struct usbhs_pipe *pipe = pkt->pipe; |
| |
| usbhs_pipe_sequence_data1(pipe); /* DATA1 */ |
| |
| /* |
| * change handler to PIO push |
| */ |
| pkt->handler = &usbhs_fifo_pio_push_handler; |
| |
| return pkt->handler->prepare(pkt, is_done); |
| } |
| |
| struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler = { |
| .prepare = usbhsf_dcp_data_stage_try_push, |
| }; |
| |
| /* |
| * DCP data stage (pop) |
| */ |
| static int usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt *pkt, |
| int *is_done) |
| { |
| struct usbhs_pipe *pipe = pkt->pipe; |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); |
| |
| if (usbhs_pipe_is_busy(pipe)) |
| return 0; |
| |
| /* |
| * prepare pop for DCP should |
| * - change DCP direction, |
| * - clear fifo |
| * - DATA1 |
| */ |
| usbhs_pipe_disable(pipe); |
| |
| usbhs_pipe_sequence_data1(pipe); /* DATA1 */ |
| |
| usbhsf_fifo_select(pipe, fifo, 0); |
| usbhsf_fifo_clear(pipe, fifo); |
| usbhsf_fifo_unselect(pipe, fifo); |
| |
| /* |
| * change handler to PIO pop |
| */ |
| pkt->handler = &usbhs_fifo_pio_pop_handler; |
| |
| return pkt->handler->prepare(pkt, is_done); |
| } |
| |
| struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler = { |
| .prepare = usbhsf_dcp_data_stage_prepare_pop, |
| }; |
| |
| /* |
| * PIO push handler |
| */ |
| static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done) |
| { |
| struct usbhs_pipe *pipe = pkt->pipe; |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| struct device *dev = usbhs_priv_to_dev(priv); |
| struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ |
| void __iomem *addr = priv->base + fifo->port; |
| u8 *buf; |
| int maxp = usbhs_pipe_get_maxpacket(pipe); |
| int total_len; |
| int i, ret, len; |
| int is_short; |
| |
| usbhs_pipe_data_sequence(pipe, pkt->sequence); |
| pkt->sequence = -1; /* -1 sequence will be ignored */ |
| |
| ret = usbhsf_fifo_select(pipe, fifo, 1); |
| if (ret < 0) |
| return 0; |
| |
| ret = usbhs_pipe_is_accessible(pipe); |
| if (ret < 0) { |
| /* inaccessible pipe is not an error */ |
| ret = 0; |
| goto usbhs_fifo_write_busy; |
| } |
| |
| ret = usbhsf_fifo_barrier(priv, fifo); |
| if (ret < 0) |
| goto usbhs_fifo_write_busy; |
| |
| buf = pkt->buf + pkt->actual; |
| len = pkt->length - pkt->actual; |
| len = min(len, maxp); |
| total_len = len; |
| is_short = total_len < maxp; |
| |
| /* |
| * FIXME |
| * |
| * 32-bit access only |
| */ |
| if (len >= 4 && !((unsigned long)buf & 0x03)) { |
| iowrite32_rep(addr, buf, len / 4); |
| len %= 4; |
| buf += total_len - len; |
| } |
| |
| /* the rest operation */ |
| for (i = 0; i < len; i++) |
| iowrite8(buf[i], addr + (0x03 - (i & 0x03))); |
| |
| /* |
| * variable update |
| */ |
| pkt->actual += total_len; |
| |
| if (pkt->actual < pkt->length) |
| *is_done = 0; /* there are remainder data */ |
| else if (is_short) |
| *is_done = 1; /* short packet */ |
| else |
| *is_done = !pkt->zero; /* send zero packet ? */ |
| |
| /* |
| * pipe/irq handling |
| */ |
| if (is_short) |
| usbhsf_send_terminator(pipe, fifo); |
| |
| usbhsf_tx_irq_ctrl(pipe, !*is_done); |
| usbhs_pipe_enable(pipe); |
| |
| dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n", |
| usbhs_pipe_number(pipe), |
| pkt->length, pkt->actual, *is_done, pkt->zero); |
| |
| /* |
| * Transmission end |
| */ |
| if (*is_done) { |
| if (usbhs_pipe_is_dcp(pipe)) |
| usbhs_dcp_control_transfer_done(pipe); |
| } |
| |
| usbhsf_fifo_unselect(pipe, fifo); |
| |
| return 0; |
| |
| usbhs_fifo_write_busy: |
| usbhsf_fifo_unselect(pipe, fifo); |
| |
| /* |
| * pipe is busy. |
| * retry in interrupt |
| */ |
| usbhsf_tx_irq_ctrl(pipe, 1); |
| |
| return ret; |
| } |
| |
| struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = { |
| .prepare = usbhsf_pio_try_push, |
| .try_run = usbhsf_pio_try_push, |
| }; |
| |
| /* |
| * PIO pop handler |
| */ |
| static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done) |
| { |
| struct usbhs_pipe *pipe = pkt->pipe; |
| |
| if (usbhs_pipe_is_busy(pipe)) |
| return 0; |
| |
| /* |
| * pipe enable to prepare packet receive |
| */ |
| usbhs_pipe_data_sequence(pipe, pkt->sequence); |
| pkt->sequence = -1; /* -1 sequence will be ignored */ |
| |
| usbhs_pipe_enable(pipe); |
| usbhsf_rx_irq_ctrl(pipe, 1); |
| |
| return 0; |
| } |
| |
| static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done) |
| { |
| struct usbhs_pipe *pipe = pkt->pipe; |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| struct device *dev = usbhs_priv_to_dev(priv); |
| struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ |
| void __iomem *addr = priv->base + fifo->port; |
| u8 *buf; |
| u32 data = 0; |
| int maxp = usbhs_pipe_get_maxpacket(pipe); |
| int rcv_len, len; |
| int i, ret; |
| int total_len = 0; |
| |
| ret = usbhsf_fifo_select(pipe, fifo, 0); |
| if (ret < 0) |
| return 0; |
| |
| ret = usbhsf_fifo_barrier(priv, fifo); |
| if (ret < 0) |
| goto usbhs_fifo_read_busy; |
| |
| rcv_len = usbhsf_fifo_rcv_len(priv, fifo); |
| |
| buf = pkt->buf + pkt->actual; |
| len = pkt->length - pkt->actual; |
| len = min(len, rcv_len); |
| total_len = len; |
| |
| /* |
| * update actual length first here to decide disable pipe. |
| * if this pipe keeps BUF status and all data were popped, |
| * then, next interrupt/token will be issued again |
| */ |
| pkt->actual += total_len; |
| |
| if ((pkt->actual == pkt->length) || /* receive all data */ |
| (total_len < maxp)) { /* short packet */ |
| *is_done = 1; |
| usbhsf_rx_irq_ctrl(pipe, 0); |
| usbhs_pipe_disable(pipe); /* disable pipe first */ |
| } |
| |
| /* |
| * Buffer clear if Zero-Length packet |
| * |
| * see |
| * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function" |
| */ |
| if (0 == rcv_len) { |
| pkt->zero = 1; |
| usbhsf_fifo_clear(pipe, fifo); |
| goto usbhs_fifo_read_end; |
| } |
| |
| /* |
| * FIXME |
| * |
| * 32-bit access only |
| */ |
| if (len >= 4 && !((unsigned long)buf & 0x03)) { |
| ioread32_rep(addr, buf, len / 4); |
| len %= 4; |
| buf += total_len - len; |
| } |
| |
| /* the rest operation */ |
| for (i = 0; i < len; i++) { |
| if (!(i & 0x03)) |
| data = ioread32(addr); |
| |
| buf[i] = (data >> ((i & 0x03) * 8)) & 0xff; |
| } |
| |
| usbhs_fifo_read_end: |
| dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n", |
| usbhs_pipe_number(pipe), |
| pkt->length, pkt->actual, *is_done, pkt->zero); |
| |
| usbhs_fifo_read_busy: |
| usbhsf_fifo_unselect(pipe, fifo); |
| |
| return ret; |
| } |
| |
| struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler = { |
| .prepare = usbhsf_prepare_pop, |
| .try_run = usbhsf_pio_try_pop, |
| }; |
| |
| /* |
| * DCP ctrol statge handler |
| */ |
| static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt, int *is_done) |
| { |
| usbhs_dcp_control_transfer_done(pkt->pipe); |
| |
| *is_done = 1; |
| |
| return 0; |
| } |
| |
| struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler = { |
| .prepare = usbhsf_ctrl_stage_end, |
| .try_run = usbhsf_ctrl_stage_end, |
| }; |
| |
| /* |
| * DMA fifo functions |
| */ |
| static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo, |
| struct usbhs_pkt *pkt) |
| { |
| if (&usbhs_fifo_dma_push_handler == pkt->handler) |
| return fifo->tx_chan; |
| |
| if (&usbhs_fifo_dma_pop_handler == pkt->handler) |
| return fifo->rx_chan; |
| |
| return NULL; |
| } |
| |
| static struct usbhs_fifo *usbhsf_get_dma_fifo(struct usbhs_priv *priv, |
| struct usbhs_pkt *pkt) |
| { |
| struct usbhs_fifo *fifo; |
| |
| /* DMA :: D0FIFO */ |
| fifo = usbhsf_get_d0fifo(priv); |
| if (usbhsf_dma_chan_get(fifo, pkt) && |
| !usbhsf_fifo_is_busy(fifo)) |
| return fifo; |
| |
| /* DMA :: D1FIFO */ |
| fifo = usbhsf_get_d1fifo(priv); |
| if (usbhsf_dma_chan_get(fifo, pkt) && |
| !usbhsf_fifo_is_busy(fifo)) |
| return fifo; |
| |
| return NULL; |
| } |
| |
| #define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE) |
| #define usbhsf_dma_stop(p, f) __usbhsf_dma_ctrl(p, f, 0) |
| static void __usbhsf_dma_ctrl(struct usbhs_pipe *pipe, |
| struct usbhs_fifo *fifo, |
| u16 dreqe) |
| { |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| |
| usbhs_bset(priv, fifo->sel, DREQE, dreqe); |
| } |
| |
| #define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1) |
| #define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0) |
| static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map) |
| { |
| struct usbhs_pipe *pipe = pkt->pipe; |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv); |
| |
| return info->dma_map_ctrl(pkt, map); |
| } |
| |
| static void usbhsf_dma_complete(void *arg); |
| static void usbhsf_dma_prepare_tasklet(unsigned long data) |
| { |
| struct usbhs_pkt *pkt = (struct usbhs_pkt *)data; |
| struct usbhs_pipe *pipe = pkt->pipe; |
| struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe); |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| struct scatterlist sg; |
| struct dma_async_tx_descriptor *desc; |
| struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt); |
| struct device *dev = usbhs_priv_to_dev(priv); |
| enum dma_data_direction dir; |
| dma_cookie_t cookie; |
| |
| dir = usbhs_pipe_is_dir_in(pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; |
| |
| sg_init_table(&sg, 1); |
| sg_set_page(&sg, virt_to_page(pkt->dma), |
| pkt->length, offset_in_page(pkt->dma)); |
| sg_dma_address(&sg) = pkt->dma + pkt->actual; |
| sg_dma_len(&sg) = pkt->trans; |
| |
| desc = chan->device->device_prep_slave_sg(chan, &sg, 1, dir, |
| DMA_PREP_INTERRUPT | |
| DMA_CTRL_ACK); |
| if (!desc) |
| return; |
| |
| desc->callback = usbhsf_dma_complete; |
| desc->callback_param = pipe; |
| |
| cookie = desc->tx_submit(desc); |
| if (cookie < 0) { |
| dev_err(dev, "Failed to submit dma descriptor\n"); |
| return; |
| } |
| |
| dev_dbg(dev, " %s %d (%d/ %d)\n", |
| fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero); |
| |
| usbhsf_dma_start(pipe, fifo); |
| dma_async_issue_pending(chan); |
| } |
| |
| /* |
| * DMA push handler |
| */ |
| static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done) |
| { |
| struct usbhs_pipe *pipe = pkt->pipe; |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| struct usbhs_fifo *fifo; |
| int len = pkt->length - pkt->actual; |
| int ret; |
| |
| if (usbhs_pipe_is_busy(pipe)) |
| return 0; |
| |
| /* use PIO if packet is less than pio_dma_border or pipe is DCP */ |
| if ((len < usbhs_get_dparam(priv, pio_dma_border)) || |
| usbhs_pipe_is_dcp(pipe)) |
| goto usbhsf_pio_prepare_push; |
| |
| if (len % 4) /* 32bit alignment */ |
| goto usbhsf_pio_prepare_push; |
| |
| if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */ |
| goto usbhsf_pio_prepare_push; |
| |
| /* get enable DMA fifo */ |
| fifo = usbhsf_get_dma_fifo(priv, pkt); |
| if (!fifo) |
| goto usbhsf_pio_prepare_push; |
| |
| if (usbhsf_dma_map(pkt) < 0) |
| goto usbhsf_pio_prepare_push; |
| |
| ret = usbhsf_fifo_select(pipe, fifo, 0); |
| if (ret < 0) |
| goto usbhsf_pio_prepare_push_unmap; |
| |
| pkt->trans = len; |
| |
| tasklet_init(&fifo->tasklet, |
| usbhsf_dma_prepare_tasklet, |
| (unsigned long)pkt); |
| |
| tasklet_schedule(&fifo->tasklet); |
| |
| return 0; |
| |
| usbhsf_pio_prepare_push_unmap: |
| usbhsf_dma_unmap(pkt); |
| usbhsf_pio_prepare_push: |
| /* |
| * change handler to PIO |
| */ |
| pkt->handler = &usbhs_fifo_pio_push_handler; |
| |
| return pkt->handler->prepare(pkt, is_done); |
| } |
| |
| static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done) |
| { |
| struct usbhs_pipe *pipe = pkt->pipe; |
| |
| pkt->actual = pkt->trans; |
| |
| *is_done = !pkt->zero; /* send zero packet ? */ |
| |
| usbhsf_dma_stop(pipe, pipe->fifo); |
| usbhsf_dma_unmap(pkt); |
| usbhsf_fifo_unselect(pipe, pipe->fifo); |
| |
| return 0; |
| } |
| |
| struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = { |
| .prepare = usbhsf_dma_prepare_push, |
| .dma_done = usbhsf_dma_push_done, |
| }; |
| |
| /* |
| * DMA pop handler |
| */ |
| static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done) |
| { |
| struct usbhs_pipe *pipe = pkt->pipe; |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| struct usbhs_fifo *fifo; |
| int len, ret; |
| |
| if (usbhs_pipe_is_busy(pipe)) |
| return 0; |
| |
| if (usbhs_pipe_is_dcp(pipe)) |
| goto usbhsf_pio_prepare_pop; |
| |
| /* get enable DMA fifo */ |
| fifo = usbhsf_get_dma_fifo(priv, pkt); |
| if (!fifo) |
| goto usbhsf_pio_prepare_pop; |
| |
| if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */ |
| goto usbhsf_pio_prepare_pop; |
| |
| ret = usbhsf_fifo_select(pipe, fifo, 0); |
| if (ret < 0) |
| goto usbhsf_pio_prepare_pop; |
| |
| /* use PIO if packet is less than pio_dma_border */ |
| len = usbhsf_fifo_rcv_len(priv, fifo); |
| len = min(pkt->length - pkt->actual, len); |
| if (len % 4) /* 32bit alignment */ |
| goto usbhsf_pio_prepare_pop_unselect; |
| |
| if (len < usbhs_get_dparam(priv, pio_dma_border)) |
| goto usbhsf_pio_prepare_pop_unselect; |
| |
| ret = usbhsf_fifo_barrier(priv, fifo); |
| if (ret < 0) |
| goto usbhsf_pio_prepare_pop_unselect; |
| |
| if (usbhsf_dma_map(pkt) < 0) |
| goto usbhsf_pio_prepare_pop_unselect; |
| |
| /* DMA */ |
| |
| /* |
| * usbhs_fifo_dma_pop_handler :: prepare |
| * enabled irq to come here. |
| * but it is no longer needed for DMA. disable it. |
| */ |
| usbhsf_rx_irq_ctrl(pipe, 0); |
| |
| pkt->trans = len; |
| |
| tasklet_init(&fifo->tasklet, |
| usbhsf_dma_prepare_tasklet, |
| (unsigned long)pkt); |
| |
| tasklet_schedule(&fifo->tasklet); |
| |
| return 0; |
| |
| usbhsf_pio_prepare_pop_unselect: |
| usbhsf_fifo_unselect(pipe, fifo); |
| usbhsf_pio_prepare_pop: |
| |
| /* |
| * change handler to PIO |
| */ |
| pkt->handler = &usbhs_fifo_pio_pop_handler; |
| |
| return pkt->handler->try_run(pkt, is_done); |
| } |
| |
| static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *is_done) |
| { |
| struct usbhs_pipe *pipe = pkt->pipe; |
| int maxp = usbhs_pipe_get_maxpacket(pipe); |
| |
| usbhsf_dma_stop(pipe, pipe->fifo); |
| usbhsf_dma_unmap(pkt); |
| usbhsf_fifo_unselect(pipe, pipe->fifo); |
| |
| pkt->actual += pkt->trans; |
| |
| if ((pkt->actual == pkt->length) || /* receive all data */ |
| (pkt->trans < maxp)) { /* short packet */ |
| *is_done = 1; |
| } else { |
| /* re-enable */ |
| usbhsf_prepare_pop(pkt, is_done); |
| } |
| |
| return 0; |
| } |
| |
| struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = { |
| .prepare = usbhsf_prepare_pop, |
| .try_run = usbhsf_dma_try_pop, |
| .dma_done = usbhsf_dma_pop_done |
| }; |
| |
| /* |
| * DMA setting |
| */ |
| static bool usbhsf_dma_filter(struct dma_chan *chan, void *param) |
| { |
| struct sh_dmae_slave *slave = param; |
| |
| /* |
| * FIXME |
| * |
| * usbhs doesn't recognize id = 0 as valid DMA |
| */ |
| if (0 == slave->slave_id) |
| return false; |
| |
| chan->private = slave; |
| |
| return true; |
| } |
| |
| static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo) |
| { |
| if (fifo->tx_chan) |
| dma_release_channel(fifo->tx_chan); |
| if (fifo->rx_chan) |
| dma_release_channel(fifo->rx_chan); |
| |
| fifo->tx_chan = NULL; |
| fifo->rx_chan = NULL; |
| } |
| |
| static void usbhsf_dma_init(struct usbhs_priv *priv, |
| struct usbhs_fifo *fifo) |
| { |
| struct device *dev = usbhs_priv_to_dev(priv); |
| dma_cap_mask_t mask; |
| |
| dma_cap_zero(mask); |
| dma_cap_set(DMA_SLAVE, mask); |
| fifo->tx_chan = dma_request_channel(mask, usbhsf_dma_filter, |
| &fifo->tx_slave); |
| |
| dma_cap_zero(mask); |
| dma_cap_set(DMA_SLAVE, mask); |
| fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter, |
| &fifo->rx_slave); |
| |
| if (fifo->tx_chan || fifo->rx_chan) |
| dev_dbg(dev, "enable DMAEngine (%s%s%s)\n", |
| fifo->name, |
| fifo->tx_chan ? "[TX]" : " ", |
| fifo->rx_chan ? "[RX]" : " "); |
| } |
| |
| /* |
| * irq functions |
| */ |
| static int usbhsf_irq_empty(struct usbhs_priv *priv, |
| struct usbhs_irq_state *irq_state) |
| { |
| struct usbhs_pipe *pipe; |
| struct device *dev = usbhs_priv_to_dev(priv); |
| int i, ret; |
| |
| if (!irq_state->bempsts) { |
| dev_err(dev, "debug %s !!\n", __func__); |
| return -EIO; |
| } |
| |
| dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts); |
| |
| /* |
| * search interrupted "pipe" |
| * not "uep". |
| */ |
| usbhs_for_each_pipe_with_dcp(pipe, priv, i) { |
| if (!(irq_state->bempsts & (1 << i))) |
| continue; |
| |
| ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN); |
| if (ret < 0) |
| dev_err(dev, "irq_empty run_error %d : %d\n", i, ret); |
| } |
| |
| return 0; |
| } |
| |
| static int usbhsf_irq_ready(struct usbhs_priv *priv, |
| struct usbhs_irq_state *irq_state) |
| { |
| struct usbhs_pipe *pipe; |
| struct device *dev = usbhs_priv_to_dev(priv); |
| int i, ret; |
| |
| if (!irq_state->brdysts) { |
| dev_err(dev, "debug %s !!\n", __func__); |
| return -EIO; |
| } |
| |
| dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts); |
| |
| /* |
| * search interrupted "pipe" |
| * not "uep". |
| */ |
| usbhs_for_each_pipe_with_dcp(pipe, priv, i) { |
| if (!(irq_state->brdysts & (1 << i))) |
| continue; |
| |
| ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN); |
| if (ret < 0) |
| dev_err(dev, "irq_ready run_error %d : %d\n", i, ret); |
| } |
| |
| return 0; |
| } |
| |
| static void usbhsf_dma_complete(void *arg) |
| { |
| struct usbhs_pipe *pipe = arg; |
| struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
| struct device *dev = usbhs_priv_to_dev(priv); |
| int ret; |
| |
| ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_DMA_DONE); |
| if (ret < 0) |
| dev_err(dev, "dma_complete run_error %d : %d\n", |
| usbhs_pipe_number(pipe), ret); |
| } |
| |
| /* |
| * fifo init |
| */ |
| void usbhs_fifo_init(struct usbhs_priv *priv) |
| { |
| struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
| struct usbhs_fifo *cfifo = usbhsf_get_cfifo(priv); |
| struct usbhs_fifo *d0fifo = usbhsf_get_d0fifo(priv); |
| struct usbhs_fifo *d1fifo = usbhsf_get_d1fifo(priv); |
| |
| mod->irq_empty = usbhsf_irq_empty; |
| mod->irq_ready = usbhsf_irq_ready; |
| mod->irq_bempsts = 0; |
| mod->irq_brdysts = 0; |
| |
| cfifo->pipe = NULL; |
| cfifo->tx_chan = NULL; |
| cfifo->rx_chan = NULL; |
| |
| d0fifo->pipe = NULL; |
| d0fifo->tx_chan = NULL; |
| d0fifo->rx_chan = NULL; |
| |
| d1fifo->pipe = NULL; |
| d1fifo->tx_chan = NULL; |
| d1fifo->rx_chan = NULL; |
| |
| usbhsf_dma_init(priv, usbhsf_get_d0fifo(priv)); |
| usbhsf_dma_init(priv, usbhsf_get_d1fifo(priv)); |
| } |
| |
| void usbhs_fifo_quit(struct usbhs_priv *priv) |
| { |
| struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
| |
| mod->irq_empty = NULL; |
| mod->irq_ready = NULL; |
| mod->irq_bempsts = 0; |
| mod->irq_brdysts = 0; |
| |
| usbhsf_dma_quit(priv, usbhsf_get_d0fifo(priv)); |
| usbhsf_dma_quit(priv, usbhsf_get_d1fifo(priv)); |
| } |
| |
| int usbhs_fifo_probe(struct usbhs_priv *priv) |
| { |
| struct usbhs_fifo *fifo; |
| |
| /* CFIFO */ |
| fifo = usbhsf_get_cfifo(priv); |
| fifo->name = "CFIFO"; |
| fifo->port = CFIFO; |
| fifo->sel = CFIFOSEL; |
| fifo->ctr = CFIFOCTR; |
| |
| /* D0FIFO */ |
| fifo = usbhsf_get_d0fifo(priv); |
| fifo->name = "D0FIFO"; |
| fifo->port = D0FIFO; |
| fifo->sel = D0FIFOSEL; |
| fifo->ctr = D0FIFOCTR; |
| fifo->tx_slave.slave_id = usbhs_get_dparam(priv, d0_tx_id); |
| fifo->rx_slave.slave_id = usbhs_get_dparam(priv, d0_rx_id); |
| |
| /* D1FIFO */ |
| fifo = usbhsf_get_d1fifo(priv); |
| fifo->name = "D1FIFO"; |
| fifo->port = D1FIFO; |
| fifo->sel = D1FIFOSEL; |
| fifo->ctr = D1FIFOCTR; |
| fifo->tx_slave.slave_id = usbhs_get_dparam(priv, d1_tx_id); |
| fifo->rx_slave.slave_id = usbhs_get_dparam(priv, d1_rx_id); |
| |
| return 0; |
| } |
| |
| void usbhs_fifo_remove(struct usbhs_priv *priv) |
| { |
| } |