126 /* maintainer note: do we really want to have a global host pointer? */
127 static struct mxcmci_host *host = &mxcmci_host;  variable
129 static inline int mxcmci_use_dma(struct mxcmci_host *host)  in mxcmci_use_dma()  argument
131 	return host->do_dma;  in mxcmci_use_dma()
134 static void mxcmci_softreset(struct mxcmci_host *host)  in mxcmci_softreset()  argument
139 	writel(STR_STP_CLK_RESET, &host->base->str_stp_clk);  in mxcmci_softreset()
141 			&host->base->str_stp_clk);  in mxcmci_softreset()
144 		writel(STR_STP_CLK_START_CLK, &host->base->str_stp_clk);  in mxcmci_softreset()
146 	writel(0xff, &host->base->res_to);  in mxcmci_softreset()
149 static void mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data)  in mxcmci_setup_data()  argument
155 	host->data = data;  in mxcmci_setup_data()
157 	writel(nob, &host->base->nob);  in mxcmci_setup_data()
158 	writel(blksz, &host->base->blk_len);  in mxcmci_setup_data()
159 	host->datasize = datasize;  in mxcmci_setup_data()
162 static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_cmd *cmd,  in mxcmci_start_cmd()  argument
165 	if (host->cmd != NULL)  in mxcmci_start_cmd()
167 	host->cmd = cmd;  in mxcmci_start_cmd()
188 	writel(cmd->cmdidx, &host->base->cmd);  in mxcmci_start_cmd()
189 	writel(cmd->cmdarg, &host->base->arg);  in mxcmci_start_cmd()
190 	writel(cmdat, &host->base->cmd_dat_cont);  in mxcmci_start_cmd()
195 static void mxcmci_finish_request(struct mxcmci_host *host,  in mxcmci_finish_request()  argument
198 	host->cmd = NULL;  in mxcmci_finish_request()
199 	host->data = NULL;  in mxcmci_finish_request()
202 static int mxcmci_finish_data(struct mxcmci_host *host, unsigned int stat)  in mxcmci_finish_data()  argument
224 	host->data = NULL;  in mxcmci_finish_data()
229 static int mxcmci_read_response(struct mxcmci_host *host, unsigned int stat)  in mxcmci_read_response()  argument
231 	struct mmc_cmd *cmd = host->cmd;  in mxcmci_read_response()
250 				a = readl(&host->base->res_fifo) & 0xFFFF;  in mxcmci_read_response()
251 				b = readl(&host->base->res_fifo) & 0xFFFF;  in mxcmci_read_response()
255 			a = readl(&host->base->res_fifo) & 0xFFFF;  in mxcmci_read_response()
256 			b = readl(&host->base->res_fifo) & 0xFFFF;  in mxcmci_read_response()
257 			c = readl(&host->base->res_fifo) & 0xFFFF;  in mxcmci_read_response()
264 static int mxcmci_poll_status(struct mxcmci_host *host, u32 mask)  in mxcmci_poll_status()  argument
270 		stat = readl(&host->base->status);  in mxcmci_poll_status()
280 static int mxcmci_pull(struct mxcmci_host *host, void *_buf, int bytes)  in mxcmci_pull()  argument
286 		stat = mxcmci_poll_status(host,  in mxcmci_pull()
290 		*buf++ = readl(&host->base->buffer_access);  in mxcmci_pull()
298 		stat = mxcmci_poll_status(host,  in mxcmci_pull()
302 		tmp = readl(&host->base->buffer_access);  in mxcmci_pull()
309 static int mxcmci_push(struct mxcmci_host *host, const void *_buf, int bytes)  in mxcmci_push()  argument
315 		stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY);  in mxcmci_push()
318 		writel(*buf++, &host->base->buffer_access);  in mxcmci_push()
326 		stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY);  in mxcmci_push()
331 		writel(tmp, &host->base->buffer_access);  in mxcmci_push()
334 	stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY);  in mxcmci_push()
341 static int mxcmci_transfer_data(struct mxcmci_host *host)  in mxcmci_transfer_data()  argument
343 	struct mmc_data *data = host->data;  in mxcmci_transfer_data()
348 	host->datasize = 0;  in mxcmci_transfer_data()
351 		stat = mxcmci_pull(host, data->dest, length);  in mxcmci_transfer_data()
354 		host->datasize += length;  in mxcmci_transfer_data()
356 		stat = mxcmci_push(host, (const void *)(data->src), length);  in mxcmci_transfer_data()
359 		host->datasize += length;  in mxcmci_transfer_data()
360 		stat = mxcmci_poll_status(host, STATUS_WRITE_OP_DONE);  in mxcmci_transfer_data()
367 static int mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat)  in mxcmci_cmd_done()  argument
372 	ret = mxcmci_read_response(host, stat);  in mxcmci_cmd_done()
375 		mxcmci_finish_request(host, host->cmd, host->data);  in mxcmci_cmd_done()
379 	if (!host->data) {  in mxcmci_cmd_done()
380 		mxcmci_finish_request(host, host->cmd, host->data);  in mxcmci_cmd_done()
384 	datastat = mxcmci_transfer_data(host);  in mxcmci_cmd_done()
385 	ret = mxcmci_finish_data(host, datastat);  in mxcmci_cmd_done()
386 	mxcmci_finish_request(host, host->cmd, host->data);  in mxcmci_cmd_done()
393 	struct mxcmci_host *host = mmc->priv;  in mxcmci_request()  local
394 	unsigned int cmdat = host->cmdat;  in mxcmci_request()
398 	host->cmdat &= ~CMD_DAT_CONT_INIT;  in mxcmci_request()
400 		mxcmci_setup_data(host, data);  in mxcmci_request()
408 	if ((ret = mxcmci_start_cmd(host, cmd, cmdat))) {  in mxcmci_request()
409 		mxcmci_finish_request(host, cmd, data);  in mxcmci_request()
414 		stat = readl(&host->base->status);  in mxcmci_request()
415 		writel(stat, &host->base->status);  in mxcmci_request()
418 	return mxcmci_cmd_done(host, stat);  in mxcmci_request()
421 static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios)  in mxcmci_set_clk_rate()  argument
448 	writel((prescaler << 4) | divider, &host->base->clk_rate);  in mxcmci_set_clk_rate()
453 	struct mxcmci_host *host = mmc->priv;  in mxcmci_set_ios()  local
455 		host->cmdat |= CMD_DAT_CONT_BUS_WIDTH_4;  in mxcmci_set_ios()
457 		host->cmdat &= ~CMD_DAT_CONT_BUS_WIDTH_4;  in mxcmci_set_ios()
460 		mxcmci_set_clk_rate(host, mmc->clock);  in mxcmci_set_ios()
461 		writel(STR_STP_CLK_START_CLK, &host->base->str_stp_clk);  in mxcmci_set_ios()
463 		writel(STR_STP_CLK_STOP_CLK, &host->base->str_stp_clk);  in mxcmci_set_ios()
466 	host->clock = mmc->clock;  in mxcmci_set_ios()
473 	struct mxcmci_host *host = mmc->priv;  in mxcmci_init()  local
475 	mxcmci_softreset(host);  in mxcmci_init()
477 	host->rev_no = readl(&host->base->rev_no);  in mxcmci_init()
478 	if (host->rev_no != 0x400) {  in mxcmci_init()
480 			host->rev_no);  in mxcmci_init()
485 	writel(0x2db4, &host->base->read_to);  in mxcmci_init()
487 	writel(0, &host->base->int_cntr);  in mxcmci_init()
508 	host->base = (struct mxcmci_regs *)CONFIG_MXC_MCI_REGS_BASE;  in mxcmci_initialize()
513 	host->mmc = mmc_create(&mxcmci_cfg, host);  in mxcmci_initialize()
514 	if (host->mmc == NULL)  in mxcmci_initialize()