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tty: serial: samsung_tty: Separate S3C64XX ops structure
Instead of patching a single global ops structure depending on the port type, use a separate s3c64xx_serial_ops for the S3C64XX type. This allows us to mark the structures as const. Also split out s3c64xx_serial_shutdown into a separate function now that we have a separate ops structure; this avoids excessive branching control flow and mirrors s3c64xx_serial_startup. tx_claimed and rx_claimed are only used in the S3C24XX functions. Signed-off-by: Hector Martin <marcan@marcan.st> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Tested-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Link: https://lore.kernel.org/r/20210304213902.83903-19-marcan@marcan.st Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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19d48787e3
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1 changed files with 54 additions and 17 deletions
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@ -1099,27 +1099,36 @@ static void s3c24xx_serial_shutdown(struct uart_port *port)
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struct s3c24xx_uart_port *ourport = to_ourport(port);
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struct s3c24xx_uart_port *ourport = to_ourport(port);
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if (ourport->tx_claimed) {
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if (ourport->tx_claimed) {
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if (!s3c24xx_serial_has_interrupt_mask(port))
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free_irq(ourport->tx_irq, ourport);
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free_irq(ourport->tx_irq, ourport);
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ourport->tx_enabled = 0;
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ourport->tx_enabled = 0;
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ourport->tx_claimed = 0;
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ourport->tx_claimed = 0;
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ourport->tx_mode = 0;
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ourport->tx_mode = 0;
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}
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}
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if (ourport->rx_claimed) {
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if (ourport->rx_claimed) {
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if (!s3c24xx_serial_has_interrupt_mask(port))
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free_irq(ourport->rx_irq, ourport);
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free_irq(ourport->rx_irq, ourport);
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ourport->rx_claimed = 0;
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ourport->rx_claimed = 0;
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ourport->rx_enabled = 0;
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ourport->rx_enabled = 0;
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}
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}
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/* Clear pending interrupts and mask all interrupts */
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if (ourport->dma)
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if (s3c24xx_serial_has_interrupt_mask(port)) {
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s3c24xx_serial_release_dma(ourport);
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free_irq(port->irq, ourport);
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wr_regl(port, S3C64XX_UINTP, 0xf);
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ourport->tx_in_progress = 0;
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wr_regl(port, S3C64XX_UINTM, 0xf);
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}
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}
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static void s3c64xx_serial_shutdown(struct uart_port *port)
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{
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struct s3c24xx_uart_port *ourport = to_ourport(port);
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ourport->tx_enabled = 0;
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ourport->tx_mode = 0;
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ourport->rx_enabled = 0;
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free_irq(port->irq, ourport);
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wr_regl(port, S3C64XX_UINTP, 0xf);
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wr_regl(port, S3C64XX_UINTM, 0xf);
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if (ourport->dma)
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if (ourport->dma)
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s3c24xx_serial_release_dma(ourport);
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s3c24xx_serial_release_dma(ourport);
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@ -1194,9 +1203,7 @@ static int s3c64xx_serial_startup(struct uart_port *port)
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/* For compatibility with s3c24xx Soc's */
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/* For compatibility with s3c24xx Soc's */
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ourport->rx_enabled = 1;
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ourport->rx_enabled = 1;
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ourport->rx_claimed = 1;
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ourport->tx_enabled = 0;
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ourport->tx_enabled = 0;
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ourport->tx_claimed = 1;
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spin_lock_irqsave(&port->lock, flags);
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spin_lock_irqsave(&port->lock, flags);
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@ -1609,7 +1616,7 @@ static void s3c24xx_serial_put_poll_char(struct uart_port *port,
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unsigned char c);
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unsigned char c);
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#endif
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#endif
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static struct uart_ops s3c24xx_serial_ops = {
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static const struct uart_ops s3c24xx_serial_ops = {
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.pm = s3c24xx_serial_pm,
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.pm = s3c24xx_serial_pm,
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.tx_empty = s3c24xx_serial_tx_empty,
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.tx_empty = s3c24xx_serial_tx_empty,
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.get_mctrl = s3c24xx_serial_get_mctrl,
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.get_mctrl = s3c24xx_serial_get_mctrl,
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@ -1632,6 +1639,29 @@ static struct uart_ops s3c24xx_serial_ops = {
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#endif
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#endif
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};
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};
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static const struct uart_ops s3c64xx_serial_ops = {
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.pm = s3c24xx_serial_pm,
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.tx_empty = s3c24xx_serial_tx_empty,
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.get_mctrl = s3c24xx_serial_get_mctrl,
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.set_mctrl = s3c24xx_serial_set_mctrl,
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.stop_tx = s3c24xx_serial_stop_tx,
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.start_tx = s3c24xx_serial_start_tx,
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.stop_rx = s3c24xx_serial_stop_rx,
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.break_ctl = s3c24xx_serial_break_ctl,
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.startup = s3c64xx_serial_startup,
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.shutdown = s3c64xx_serial_shutdown,
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.set_termios = s3c24xx_serial_set_termios,
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.type = s3c24xx_serial_type,
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.release_port = s3c24xx_serial_release_port,
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.request_port = s3c24xx_serial_request_port,
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.config_port = s3c24xx_serial_config_port,
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.verify_port = s3c24xx_serial_verify_port,
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#if defined(CONFIG_SERIAL_SAMSUNG_CONSOLE) && defined(CONFIG_CONSOLE_POLL)
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.poll_get_char = s3c24xx_serial_get_poll_char,
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.poll_put_char = s3c24xx_serial_put_poll_char,
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#endif
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};
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static struct uart_driver s3c24xx_uart_drv = {
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static struct uart_driver s3c24xx_uart_drv = {
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.owner = THIS_MODULE,
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.owner = THIS_MODULE,
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.driver_name = "s3c2410_serial",
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.driver_name = "s3c2410_serial",
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@ -1864,10 +1894,6 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
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/* setup info for port */
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/* setup info for port */
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port->dev = &platdev->dev;
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port->dev = &platdev->dev;
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/* Startup sequence is different for s3c64xx and higher SoC's */
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if (s3c24xx_serial_has_interrupt_mask(port))
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s3c24xx_serial_ops.startup = s3c64xx_serial_startup;
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port->uartclk = 1;
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port->uartclk = 1;
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if (cfg->uart_flags & UPF_CONS_FLOW) {
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if (cfg->uart_flags & UPF_CONS_FLOW) {
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@ -2015,6 +2041,17 @@ static int s3c24xx_serial_probe(struct platform_device *pdev)
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dev_get_platdata(&pdev->dev) :
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dev_get_platdata(&pdev->dev) :
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ourport->drv_data->def_cfg;
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ourport->drv_data->def_cfg;
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switch (ourport->info->type) {
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case PORT_S3C2410:
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case PORT_S3C2412:
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case PORT_S3C2440:
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ourport->port.ops = &s3c24xx_serial_ops;
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break;
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case PORT_S3C6400:
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ourport->port.ops = &s3c64xx_serial_ops;
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break;
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}
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if (np) {
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if (np) {
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of_property_read_u32(np,
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of_property_read_u32(np,
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"samsung,uart-fifosize", &ourport->port.fifosize);
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"samsung,uart-fifosize", &ourport->port.fifosize);
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