Lines Matching refs:hw
76 struct nuc900_spi *hw = to_hw(spi);
82 spin_lock_irqsave(&hw->lock, flags);
84 val = __raw_readl(hw->regs + USI_SSR);
96 __raw_writel(val, hw->regs + USI_SSR);
98 val = __raw_readl(hw->regs + USI_CNT);
105 __raw_writel(val, hw->regs + USI_CNT);
107 spin_unlock_irqrestore(&hw->lock, flags);
123 static void nuc900_spi_setup_txnum(struct nuc900_spi *hw,
129 spin_lock_irqsave(&hw->lock, flags);
131 val = __raw_readl(hw->regs + USI_CNT);
138 __raw_writel(val, hw->regs + USI_CNT);
140 spin_unlock_irqrestore(&hw->lock, flags);
144 static void nuc900_spi_setup_txbitlen(struct nuc900_spi *hw,
150 spin_lock_irqsave(&hw->lock, flags);
152 val = __raw_readl(hw->regs + USI_CNT);
156 __raw_writel(val, hw->regs + USI_CNT);
158 spin_unlock_irqrestore(&hw->lock, flags);
161 static void nuc900_spi_gobusy(struct nuc900_spi *hw)
166 spin_lock_irqsave(&hw->lock, flags);
168 val = __raw_readl(hw->regs + USI_CNT);
172 __raw_writel(val, hw->regs + USI_CNT);
174 spin_unlock_irqrestore(&hw->lock, flags);
188 static inline unsigned int hw_txbyte(struct nuc900_spi *hw, int count)
190 return hw->tx ? hw->tx[count] : 0;
195 struct nuc900_spi *hw = to_hw(spi);
197 hw->tx = t->tx_buf;
198 hw->rx = t->rx_buf;
199 hw->len = t->len;
200 hw->count = 0;
202 __raw_writel(hw_txbyte(hw, 0x0), hw->regs + USI_TX0);
204 nuc900_spi_gobusy(hw);
206 wait_for_completion(&hw->done);
208 return hw->count;
213 struct nuc900_spi *hw = dev;
215 unsigned int count = hw->count;
217 status = __raw_readl(hw->regs + USI_CNT);
218 __raw_writel(status, hw->regs + USI_CNT);
221 hw->count++;
223 if (hw->rx)
224 hw->rx[count] = __raw_readl(hw->regs + USI_RX0);
227 if (count < hw->len) {
228 __raw_writel(hw_txbyte(hw, count), hw->regs + USI_TX0);
229 nuc900_spi_gobusy(hw);
231 complete(&hw->done);
237 complete(&hw->done);
241 static void nuc900_tx_edge(struct nuc900_spi *hw, unsigned int edge)
246 spin_lock_irqsave(&hw->lock, flags);
248 val = __raw_readl(hw->regs + USI_CNT);
254 __raw_writel(val, hw->regs + USI_CNT);
256 spin_unlock_irqrestore(&hw->lock, flags);
259 static void nuc900_rx_edge(struct nuc900_spi *hw, unsigned int edge)
264 spin_lock_irqsave(&hw->lock, flags);
266 val = __raw_readl(hw->regs + USI_CNT);
272 __raw_writel(val, hw->regs + USI_CNT);
274 spin_unlock_irqrestore(&hw->lock, flags);
277 static void nuc900_send_first(struct nuc900_spi *hw, unsigned int lsb)
282 spin_lock_irqsave(&hw->lock, flags);
284 val = __raw_readl(hw->regs + USI_CNT);
290 __raw_writel(val, hw->regs + USI_CNT);
292 spin_unlock_irqrestore(&hw->lock, flags);
295 static void nuc900_set_sleep(struct nuc900_spi *hw, unsigned int sleep)
300 spin_lock_irqsave(&hw->lock, flags);
302 val = __raw_readl(hw->regs + USI_CNT);
308 __raw_writel(val, hw->regs + USI_CNT);
310 spin_unlock_irqrestore(&hw->lock, flags);
313 static void nuc900_enable_int(struct nuc900_spi *hw)
318 spin_lock_irqsave(&hw->lock, flags);
320 val = __raw_readl(hw->regs + USI_CNT);
324 __raw_writel(val, hw->regs + USI_CNT);
326 spin_unlock_irqrestore(&hw->lock, flags);
329 static void nuc900_set_divider(struct nuc900_spi *hw)
331 __raw_writel(hw->pdata->divider, hw->regs + USI_DIV);
334 static void nuc900_init_spi(struct nuc900_spi *hw)
336 clk_enable(hw->clk);
337 spin_lock_init(&hw->lock);
339 nuc900_tx_edge(hw, hw->pdata->txneg);
340 nuc900_rx_edge(hw, hw->pdata->rxneg);
341 nuc900_send_first(hw, hw->pdata->lsb);
342 nuc900_set_sleep(hw, hw->pdata->sleep);
343 nuc900_spi_setup_txbitlen(hw, hw->pdata->txbitlen);
344 nuc900_spi_setup_txnum(hw, hw->pdata->txnum);
345 nuc900_set_divider(hw);
346 nuc900_enable_int(hw);
351 struct nuc900_spi *hw;
362 hw = spi_master_get_devdata(master);
363 hw->master = spi_master_get(master);
364 hw->pdata = pdev->dev.platform_data;
365 hw->dev = &pdev->dev;
367 if (hw->pdata == NULL) {
373 platform_set_drvdata(pdev, hw);
374 init_completion(&hw->done);
377 master->num_chipselect = hw->pdata->num_cs;
378 master->bus_num = hw->pdata->bus_num;
379 hw->bitbang.master = hw->master;
380 hw->bitbang.setup_transfer = nuc900_spi_setupxfer;
381 hw->bitbang.chipselect = nuc900_spi_chipsel;
382 hw->bitbang.txrx_bufs = nuc900_spi_txrx;
383 hw->bitbang.master->setup = nuc900_spi_setup;
385 hw->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
386 if (hw->res == NULL) {
392 hw->ioarea = request_mem_region(hw->res->start,
393 resource_size(hw->res), pdev->name);
395 if (hw->ioarea == NULL) {
401 hw->regs = ioremap(hw->res->start, resource_size(hw->res));
402 if (hw->regs == NULL) {
408 hw->irq = platform_get_irq(pdev, 0);
409 if (hw->irq < 0) {
415 err = request_irq(hw->irq, nuc900_spi_irq, 0, pdev->name, hw);
421 hw->clk = clk_get(&pdev->dev, "spi");
422 if (IS_ERR(hw->clk)) {
424 err = PTR_ERR(hw->clk);
429 nuc900_init_spi(hw);
431 err = spi_bitbang_start(&hw->bitbang);
440 clk_disable(hw->clk);
441 clk_put(hw->clk);
443 free_irq(hw->irq, hw);
445 iounmap(hw->regs);
447 release_mem_region(hw->res->start, resource_size(hw->res));
448 kfree(hw->ioarea);
450 spi_master_put(hw->master);
458 struct nuc900_spi *hw = platform_get_drvdata(dev);
460 free_irq(hw->irq, hw);
464 spi_bitbang_stop(&hw->bitbang);
466 clk_disable(hw->clk);
467 clk_put(hw->clk);
469 iounmap(hw->regs);
471 release_mem_region(hw->res->start, resource_size(hw->res));
472 kfree(hw->ioarea);
474 spi_master_put(hw->master);