diff options
Diffstat (limited to 'drivers/tty/serial/amba-pl011.c')
| -rw-r--r-- | drivers/tty/serial/amba-pl011.c | 57 |
1 files changed, 45 insertions, 12 deletions
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 8a9e213..e2c33b9 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -93,6 +93,10 @@ static u16 pl011_std_offsets[REG_ARRAY_SIZE] = { struct vendor_data { const u16 *reg_offset; unsigned int ifls; + unsigned int fr_busy; + unsigned int fr_dsr; + unsigned int fr_cts; + unsigned int fr_ri; bool access_32b; bool oversampling; bool dma_threshold; @@ -111,6 +115,10 @@ static unsigned int get_fifosize_arm(struct amba_device *dev) static struct vendor_data vendor_arm = { .reg_offset = pl011_std_offsets, .ifls = UART011_IFLS_RX4_8|UART011_IFLS_TX4_8, + .fr_busy = UART01x_FR_BUSY, + .fr_dsr = UART01x_FR_DSR, + .fr_cts = UART01x_FR_CTS, + .fr_ri = UART011_FR_RI, .oversampling = false, .dma_threshold = false, .cts_event_workaround = false, @@ -121,6 +129,10 @@ static struct vendor_data vendor_arm = { static struct vendor_data vendor_sbsa = { .reg_offset = pl011_std_offsets, + .fr_busy = UART01x_FR_BUSY, + .fr_dsr = UART01x_FR_DSR, + .fr_cts = UART01x_FR_CTS, + .fr_ri = UART011_FR_RI, .access_32b = true, .oversampling = false, .dma_threshold = false, @@ -164,6 +176,10 @@ static unsigned int get_fifosize_st(struct amba_device *dev) static struct vendor_data vendor_st = { .reg_offset = pl011_st_offsets, .ifls = UART011_IFLS_RX_HALF|UART011_IFLS_TX_HALF, + .fr_busy = UART01x_FR_BUSY, + .fr_dsr = UART01x_FR_DSR, + .fr_cts = UART01x_FR_CTS, + .fr_ri = UART011_FR_RI, .oversampling = true, .dma_threshold = true, .cts_event_workaround = true, @@ -188,11 +204,20 @@ static const u16 pl011_zte_offsets[REG_ARRAY_SIZE] = { [REG_DMACR] = ZX_UART011_DMACR, }; -static struct vendor_data vendor_zte __maybe_unused = { +static unsigned int get_fifosize_zte(struct amba_device *dev) +{ + return 16; +} + +static struct vendor_data vendor_zte = { .reg_offset = pl011_zte_offsets, .access_32b = true, .ifls = UART011_IFLS_RX4_8|UART011_IFLS_TX4_8, - .get_fifosize = get_fifosize_arm, + .fr_busy = ZX_UART01x_FR_BUSY, + .fr_dsr = ZX_UART01x_FR_DSR, + .fr_cts = ZX_UART01x_FR_CTS, + .fr_ri = ZX_UART011_FR_RI, + .get_fifosize = get_fifosize_zte, }; /* Deals with DMA transactions */ @@ -1167,7 +1192,7 @@ static void pl011_dma_shutdown(struct uart_amba_port *uap) return; /* Disable RX and TX DMA */ - while (pl011_read(uap, REG_FR) & UART01x_FR_BUSY) + while (pl011_read(uap, REG_FR) & uap->vendor->fr_busy) cpu_relax(); spin_lock_irq(&uap->port.lock); @@ -1416,11 +1441,12 @@ static void pl011_modem_status(struct uart_amba_port *uap) if (delta & UART01x_FR_DCD) uart_handle_dcd_change(&uap->port, status & UART01x_FR_DCD); - if (delta & UART01x_FR_DSR) + if (delta & uap->vendor->fr_dsr) uap->port.icount.dsr++; - if (delta & UART01x_FR_CTS) - uart_handle_cts_change(&uap->port, status & UART01x_FR_CTS); + if (delta & uap->vendor->fr_cts) + uart_handle_cts_change(&uap->port, + status & uap->vendor->fr_cts); wake_up_interruptible(&uap->port.state->port.delta_msr_wait); } @@ -1493,7 +1519,8 @@ static unsigned int pl011_tx_empty(struct uart_port *port) struct uart_amba_port *uap = container_of(port, struct uart_amba_port, port); unsigned int status = pl011_read(uap, REG_FR); - return status & (UART01x_FR_BUSY|UART01x_FR_TXFF) ? 0 : TIOCSER_TEMT; + return status & (uap->vendor->fr_busy | UART01x_FR_TXFF) ? + 0 : TIOCSER_TEMT; } static unsigned int pl011_get_mctrl(struct uart_port *port) @@ -1508,9 +1535,9 @@ static unsigned int pl011_get_mctrl(struct uart_port *port) result |= tiocmbit TIOCMBIT(UART01x_FR_DCD, TIOCM_CAR); - TIOCMBIT(UART01x_FR_DSR, TIOCM_DSR); - TIOCMBIT(UART01x_FR_CTS, TIOCM_CTS); - TIOCMBIT(UART011_FR_RI, TIOCM_RNG); + TIOCMBIT(uap->vendor->fr_dsr, TIOCM_DSR); + TIOCMBIT(uap->vendor->fr_cts, TIOCM_CTS); + TIOCMBIT(uap->vendor->fr_ri, TIOCM_RNG); #undef TIOCMBIT return result; } @@ -2191,7 +2218,7 @@ pl011_console_write(struct console *co, const char *s, unsigned int count) * Finally, wait for transmitter to become empty * and restore the TCR */ - while (pl011_read(uap, REG_FR) & UART01x_FR_BUSY) + while (pl011_read(uap, REG_FR) & uap->vendor->fr_busy) cpu_relax(); if (!uap->vendor->always_enabled) pl011_write(old_cr, uap, REG_CR); @@ -2555,7 +2582,8 @@ static int sbsa_uart_probe(struct platform_device *pdev) ret = platform_get_irq(pdev, 0); if (ret < 0) { - dev_err(&pdev->dev, "cannot obtain irq\n"); + if (ret != -EPROBE_DEFER) + dev_err(&pdev->dev, "cannot obtain irq\n"); return ret; } uap->port.irq = ret; @@ -2622,6 +2650,11 @@ static struct amba_id pl011_ids[] = { .mask = 0x00ffffff, .data = &vendor_st, }, + { + .id = AMBA_LINUX_ID(0x00, 0x1, 0xffe), + .mask = 0x00ffffff, + .data = &vendor_zte, + }, { 0, 0 }, }; |