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Commit 24e9b75c authored by Yang Yingliang's avatar Yang Yingliang Committed by Mark Brown
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spi: ep93xx: switch to use modern name 

Change legacy name master to modern name host or controller.

No functional changed.
Signed-off-by: default avatarYang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20230807124105.3429709-4-yangyingliang@huawei.comSigned-off-by: default avatarMark Brown <broonie@kernel.org>
parent 0c35cc59
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Showing with 87 additions and 87 deletions
drivers/spi/spi-ep93xx.c
View file @ 24e9b75c
......@@ -104,15 +104,15 @@ struct ep93xx_spi {
/**
* ep93xx_spi_calc_divisors() - calculates SPI clock divisors
* @master: SPI master
* @host: SPI host
* @rate: desired SPI output clock rate
* @div_cpsr: pointer to return the cpsr (pre-scaler) divider
* @div_scr: pointer to return the scr divider
*/
static int ep93xx_spi_calc_divisors(struct spi_master *master,
static int ep93xx_spi_calc_divisors(struct spi_controller *host,
u32 rate, u8 *div_cpsr, u8 *div_scr)
{
struct ep93xx_spi *espi = spi_master_get_devdata(master);
struct ep93xx_spi *espi = spi_controller_get_devdata(host);
unsigned long spi_clk_rate = clk_get_rate(espi->clk);
int cpsr, scr;
......@@ -120,7 +120,7 @@ static int ep93xx_spi_calc_divisors(struct spi_master *master,
* Make sure that max value is between values supported by the
* controller.
*/
rate = clamp(rate, master->min_speed_hz, master->max_speed_hz);
rate = clamp(rate, host->min_speed_hz, host->max_speed_hz);
/*
* Calculate divisors so that we can get speed according the
......@@ -143,18 +143,18 @@ static int ep93xx_spi_calc_divisors(struct spi_master *master,
return -EINVAL;
}
static int ep93xx_spi_chip_setup(struct spi_master *master,
static int ep93xx_spi_chip_setup(struct spi_controller *host,
struct spi_device *spi,
struct spi_transfer *xfer)
{
struct ep93xx_spi *espi = spi_master_get_devdata(master);
struct ep93xx_spi *espi = spi_controller_get_devdata(host);
u8 dss = bits_per_word_to_dss(xfer->bits_per_word);
u8 div_cpsr = 0;
u8 div_scr = 0;
u16 cr0;
int err;
err = ep93xx_spi_calc_divisors(master, xfer->speed_hz,
err = ep93xx_spi_calc_divisors(host, xfer->speed_hz,
&div_cpsr, &div_scr);
if (err)
return err;
......@@ -166,9 +166,9 @@ static int ep93xx_spi_chip_setup(struct spi_master *master,
cr0 |= SSPCR0_SPH;
cr0 |= dss;
dev_dbg(&master->dev, "setup: mode %d, cpsr %d, scr %d, dss %d\n",
dev_dbg(&host->dev, "setup: mode %d, cpsr %d, scr %d, dss %d\n",
spi->mode, div_cpsr, div_scr, dss);
dev_dbg(&master->dev, "setup: cr0 %#x\n", cr0);
dev_dbg(&host->dev, "setup: cr0 %#x\n", cr0);
writel(div_cpsr, espi->mmio + SSPCPSR);
writel(cr0, espi->mmio + SSPCR0);
......@@ -176,10 +176,10 @@ static int ep93xx_spi_chip_setup(struct spi_master *master,
return 0;
}
static void ep93xx_do_write(struct spi_master *master)
static void ep93xx_do_write(struct spi_controller *host)
{
struct ep93xx_spi *espi = spi_master_get_devdata(master);
struct spi_transfer *xfer = master->cur_msg->state;
struct ep93xx_spi *espi = spi_controller_get_devdata(host);
struct spi_transfer *xfer = host->cur_msg->state;
u32 val = 0;
if (xfer->bits_per_word > 8) {
......@@ -194,10 +194,10 @@ static void ep93xx_do_write(struct spi_master *master)
writel(val, espi->mmio + SSPDR);
}
static void ep93xx_do_read(struct spi_master *master)
static void ep93xx_do_read(struct spi_controller *host)
{
struct ep93xx_spi *espi = spi_master_get_devdata(master);
struct spi_transfer *xfer = master->cur_msg->state;
struct ep93xx_spi *espi = spi_controller_get_devdata(host);
struct spi_transfer *xfer = host->cur_msg->state;
u32 val;
val = readl(espi->mmio + SSPDR);
......@@ -214,7 +214,7 @@ static void ep93xx_do_read(struct spi_master *master)
/**
* ep93xx_spi_read_write() - perform next RX/TX transfer
* @master: SPI master
* @host: SPI host
*
* This function transfers next bytes (or half-words) to/from RX/TX FIFOs. If
* called several times, the whole transfer will be completed. Returns
......@@ -223,20 +223,20 @@ static void ep93xx_do_read(struct spi_master *master)
* When this function is finished, RX FIFO should be empty and TX FIFO should be
* full.
*/
static int ep93xx_spi_read_write(struct spi_master *master)
static int ep93xx_spi_read_write(struct spi_controller *host)
{
struct ep93xx_spi *espi = spi_master_get_devdata(master);
struct spi_transfer *xfer = master->cur_msg->state;
struct ep93xx_spi *espi = spi_controller_get_devdata(host);
struct spi_transfer *xfer = host->cur_msg->state;
/* read as long as RX FIFO has frames in it */
while ((readl(espi->mmio + SSPSR) & SSPSR_RNE)) {
ep93xx_do_read(master);
ep93xx_do_read(host);
espi->fifo_level--;
}
/* write as long as TX FIFO has room */
while (espi->fifo_level < SPI_FIFO_SIZE && espi->tx < xfer->len) {
ep93xx_do_write(master);
ep93xx_do_write(host);
espi->fifo_level++;
}
......@@ -261,7 +261,7 @@ ep93xx_dma_data_to_trans_dir(enum dma_data_direction dir)
/**
* ep93xx_spi_dma_prepare() - prepares a DMA transfer
* @master: SPI master
* @host: SPI host
* @dir: DMA transfer direction
*
* Function configures the DMA, maps the buffer and prepares the DMA
......@@ -269,11 +269,11 @@ ep93xx_dma_data_to_trans_dir(enum dma_data_direction dir)
* in case of failure.
*/
static struct dma_async_tx_descriptor *
ep93xx_spi_dma_prepare(struct spi_master *master,
ep93xx_spi_dma_prepare(struct spi_controller *host,
enum dma_data_direction dir)
{
struct ep93xx_spi *espi = spi_master_get_devdata(master);
struct spi_transfer *xfer = master->cur_msg->state;
struct ep93xx_spi *espi = spi_controller_get_devdata(host);
struct spi_transfer *xfer = host->cur_msg->state;
struct dma_async_tx_descriptor *txd;
enum dma_slave_buswidth buswidth;
struct dma_slave_config conf;
......@@ -348,7 +348,7 @@ ep93xx_spi_dma_prepare(struct spi_master *master,
}
if (WARN_ON(len)) {
dev_warn(&master->dev, "len = %zu expected 0!\n", len);
dev_warn(&host->dev, "len = %zu expected 0!\n", len);
return ERR_PTR(-EINVAL);
}
......@@ -367,16 +367,16 @@ ep93xx_spi_dma_prepare(struct spi_master *master,
/**
* ep93xx_spi_dma_finish() - finishes with a DMA transfer
* @master: SPI master
* @host: SPI host
* @dir: DMA transfer direction
*
* Function finishes with the DMA transfer. After this, the DMA buffer is
* unmapped.
*/
static void ep93xx_spi_dma_finish(struct spi_master *master,
static void ep93xx_spi_dma_finish(struct spi_controller *host,
enum dma_data_direction dir)
{
struct ep93xx_spi *espi = spi_master_get_devdata(master);
struct ep93xx_spi *espi = spi_controller_get_devdata(host);
struct dma_chan *chan;
struct sg_table *sgt;
......@@ -393,35 +393,35 @@ static void ep93xx_spi_dma_finish(struct spi_master *master,
static void ep93xx_spi_dma_callback(void *callback_param)
{
struct spi_master *master = callback_param;
struct spi_controller *host = callback_param;
ep93xx_spi_dma_finish(master, DMA_TO_DEVICE);
ep93xx_spi_dma_finish(master, DMA_FROM_DEVICE);
ep93xx_spi_dma_finish(host, DMA_TO_DEVICE);
ep93xx_spi_dma_finish(host, DMA_FROM_DEVICE);
spi_finalize_current_transfer(master);
spi_finalize_current_transfer(host);
}
static int ep93xx_spi_dma_transfer(struct spi_master *master)
static int ep93xx_spi_dma_transfer(struct spi_controller *host)
{
struct ep93xx_spi *espi = spi_master_get_devdata(master);
struct ep93xx_spi *espi = spi_controller_get_devdata(host);
struct dma_async_tx_descriptor *rxd, *txd;
rxd = ep93xx_spi_dma_prepare(master, DMA_FROM_DEVICE);
rxd = ep93xx_spi_dma_prepare(host, DMA_FROM_DEVICE);
if (IS_ERR(rxd)) {
dev_err(&master->dev, "DMA RX failed: %ld\n", PTR_ERR(rxd));
dev_err(&host->dev, "DMA RX failed: %ld\n", PTR_ERR(rxd));
return PTR_ERR(rxd);
}
txd = ep93xx_spi_dma_prepare(master, DMA_TO_DEVICE);
txd = ep93xx_spi_dma_prepare(host, DMA_TO_DEVICE);
if (IS_ERR(txd)) {
ep93xx_spi_dma_finish(master, DMA_FROM_DEVICE);
dev_err(&master->dev, "DMA TX failed: %ld\n", PTR_ERR(txd));
ep93xx_spi_dma_finish(host, DMA_FROM_DEVICE);
dev_err(&host->dev, "DMA TX failed: %ld\n", PTR_ERR(txd));
return PTR_ERR(txd);
}
/* We are ready when RX is done */
rxd->callback = ep93xx_spi_dma_callback;
rxd->callback_param = master;
rxd->callback_param = host;
/* Now submit both descriptors and start DMA */
dmaengine_submit(rxd);
......@@ -436,8 +436,8 @@ static int ep93xx_spi_dma_transfer(struct spi_master *master)
static irqreturn_t ep93xx_spi_interrupt(int irq, void *dev_id)
{
struct spi_master *master = dev_id;
struct ep93xx_spi *espi = spi_master_get_devdata(master);
struct spi_controller *host = dev_id;
struct ep93xx_spi *espi = spi_controller_get_devdata(host);
u32 val;
/*
......@@ -447,15 +447,15 @@ static irqreturn_t ep93xx_spi_interrupt(int irq, void *dev_id)
if (readl(espi->mmio + SSPIIR) & SSPIIR_RORIS) {
/* clear the overrun interrupt */
writel(0, espi->mmio + SSPICR);
dev_warn(&master->dev,
dev_warn(&host->dev,
"receive overrun, aborting the message\n");
master->cur_msg->status = -EIO;
host->cur_msg->status = -EIO;
} else {
/*
* Interrupt is either RX (RIS) or TX (TIS). For both cases we
* simply execute next data transfer.
*/
if (ep93xx_spi_read_write(master)) {
if (ep93xx_spi_read_write(host)) {
/*
* In normal case, there still is some processing left
* for current transfer. Let's wait for the next
......@@ -474,26 +474,26 @@ static irqreturn_t ep93xx_spi_interrupt(int irq, void *dev_id)
val &= ~(SSPCR1_RORIE | SSPCR1_TIE | SSPCR1_RIE);
writel(val, espi->mmio + SSPCR1);
spi_finalize_current_transfer(master);
spi_finalize_current_transfer(host);
return IRQ_HANDLED;
}
static int ep93xx_spi_transfer_one(struct spi_master *master,
static int ep93xx_spi_transfer_one(struct spi_controller *host,
struct spi_device *spi,
struct spi_transfer *xfer)
{
struct ep93xx_spi *espi = spi_master_get_devdata(master);
struct ep93xx_spi *espi = spi_controller_get_devdata(host);
u32 val;
int ret;
ret = ep93xx_spi_chip_setup(master, spi, xfer);
ret = ep93xx_spi_chip_setup(host, spi, xfer);
if (ret) {
dev_err(&master->dev, "failed to setup chip for transfer\n");
dev_err(&host->dev, "failed to setup chip for transfer\n");
return ret;
}
master->cur_msg->state = xfer;
host->cur_msg->state = xfer;
espi->rx = 0;
espi->tx = 0;
......@@ -503,10 +503,10 @@ static int ep93xx_spi_transfer_one(struct spi_master *master,
* So in these cases we will be using PIO and don't bother for DMA.
*/
if (espi->dma_rx && xfer->len > SPI_FIFO_SIZE)
return ep93xx_spi_dma_transfer(master);
return ep93xx_spi_dma_transfer(host);
/* Using PIO so prime the TX FIFO and enable interrupts */
ep93xx_spi_read_write(master);
ep93xx_spi_read_write(host);
val = readl(espi->mmio + SSPCR1);
val |= (SSPCR1_RORIE | SSPCR1_TIE | SSPCR1_RIE);
......@@ -516,10 +516,10 @@ static int ep93xx_spi_transfer_one(struct spi_master *master,
return 1;
}
static int ep93xx_spi_prepare_message(struct spi_master *master,
static int ep93xx_spi_prepare_message(struct spi_controller *host,
struct spi_message *msg)
{
struct ep93xx_spi *espi = spi_master_get_devdata(master);
struct ep93xx_spi *espi = spi_controller_get_devdata(host);
unsigned long timeout;
/*
......@@ -528,7 +528,7 @@ static int ep93xx_spi_prepare_message(struct spi_master *master,
timeout = jiffies + msecs_to_jiffies(SPI_TIMEOUT);
while (readl(espi->mmio + SSPSR) & SSPSR_RNE) {
if (time_after(jiffies, timeout)) {
dev_warn(&master->dev,
dev_warn(&host->dev,
"timeout while flushing RX FIFO\n");
return -ETIMEDOUT;
}
......@@ -544,9 +544,9 @@ static int ep93xx_spi_prepare_message(struct spi_master *master,
return 0;
}
static int ep93xx_spi_prepare_hardware(struct spi_master *master)
static int ep93xx_spi_prepare_hardware(struct spi_controller *host)
{
struct ep93xx_spi *espi = spi_master_get_devdata(master);
struct ep93xx_spi *espi = spi_controller_get_devdata(host);
u32 val;
int ret;
......@@ -561,9 +561,9 @@ static int ep93xx_spi_prepare_hardware(struct spi_master *master)
return 0;
}
static int ep93xx_spi_unprepare_hardware(struct spi_master *master)
static int ep93xx_spi_unprepare_hardware(struct spi_controller *host)
{
struct ep93xx_spi *espi = spi_master_get_devdata(master);
struct ep93xx_spi *espi = spi_controller_get_devdata(host);
u32 val;
val = readl(espi->mmio + SSPCR1);
......@@ -646,7 +646,7 @@ static void ep93xx_spi_release_dma(struct ep93xx_spi *espi)
static int ep93xx_spi_probe(struct platform_device *pdev)
{
struct spi_master *master;
struct spi_controller *host;
struct ep93xx_spi_info *info;
struct ep93xx_spi *espi;
struct resource *res;
......@@ -663,54 +663,54 @@ static int ep93xx_spi_probe(struct platform_device *pdev)
if (irq < 0)
return irq;
master = spi_alloc_master(&pdev->dev, sizeof(*espi));
if (!master)
host = spi_alloc_host(&pdev->dev, sizeof(*espi));
if (!host)
return -ENOMEM;
master->use_gpio_descriptors = true;
master->prepare_transfer_hardware = ep93xx_spi_prepare_hardware;
master->unprepare_transfer_hardware = ep93xx_spi_unprepare_hardware;
master->prepare_message = ep93xx_spi_prepare_message;
master->transfer_one = ep93xx_spi_transfer_one;
master->bus_num = pdev->id;
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 16);
host->use_gpio_descriptors = true;
host->prepare_transfer_hardware = ep93xx_spi_prepare_hardware;
host->unprepare_transfer_hardware = ep93xx_spi_unprepare_hardware;
host->prepare_message = ep93xx_spi_prepare_message;
host->transfer_one = ep93xx_spi_transfer_one;
host->bus_num = pdev->id;
host->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
host->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 16);
/*
* The SPI core will count the number of GPIO descriptors to figure
* out the number of chip selects available on the platform.
*/
master->num_chipselect = 0;
host->num_chipselect = 0;
platform_set_drvdata(pdev, master);
platform_set_drvdata(pdev, host);
espi = spi_master_get_devdata(master);
espi = spi_controller_get_devdata(host);
espi->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(espi->clk)) {
dev_err(&pdev->dev, "unable to get spi clock\n");
error = PTR_ERR(espi->clk);
goto fail_release_master;
goto fail_release_host;
}
/*
* Calculate maximum and minimum supported clock rates
* for the controller.
*/
master->max_speed_hz = clk_get_rate(espi->clk) / 2;
master->min_speed_hz = clk_get_rate(espi->clk) / (254 * 256);
host->max_speed_hz = clk_get_rate(espi->clk) / 2;
host->min_speed_hz = clk_get_rate(espi->clk) / (254 * 256);
espi->mmio = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (IS_ERR(espi->mmio)) {
error = PTR_ERR(espi->mmio);
goto fail_release_master;
goto fail_release_host;
}
espi->sspdr_phys = res->start + SSPDR;
error = devm_request_irq(&pdev->dev, irq, ep93xx_spi_interrupt,
0, "ep93xx-spi", master);
0, "ep93xx-spi", host);
if (error) {
dev_err(&pdev->dev, "failed to request irq\n");
goto fail_release_master;
goto fail_release_host;
}
if (info->use_dma && ep93xx_spi_setup_dma(espi))
......@@ -719,9 +719,9 @@ static int ep93xx_spi_probe(struct platform_device *pdev)
/* make sure that the hardware is disabled */
writel(0, espi->mmio + SSPCR1);
error = devm_spi_register_master(&pdev->dev, master);
error = devm_spi_register_controller(&pdev->dev, host);
if (error) {
dev_err(&pdev->dev, "failed to register SPI master\n");
dev_err(&pdev->dev, "failed to register SPI host\n");
goto fail_free_dma;
}
......@@ -732,16 +732,16 @@ static int ep93xx_spi_probe(struct platform_device *pdev)
fail_free_dma:
ep93xx_spi_release_dma(espi);
fail_release_master:
spi_master_put(master);
fail_release_host:
spi_controller_put(host);
return error;
}
static void ep93xx_spi_remove(struct platform_device *pdev)
{
struct spi_master *master = platform_get_drvdata(pdev);
struct ep93xx_spi *espi = spi_master_get_devdata(master);
struct spi_controller *host = platform_get_drvdata(pdev);
struct ep93xx_spi *espi = spi_controller_get_devdata(host);
ep93xx_spi_release_dma(espi);
}
......
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