diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/serial/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/tty/serial/amba-pl011.c | 503 |
2 files changed, 125 insertions, 382 deletions
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index ed299b9e6375..687b1ea294b7 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -47,12 +47,12 @@ config SERIAL_AMBA_PL010_CONSOLE config SERIAL_AMBA_PL011 tristate "ARM AMBA PL011 serial port support" - depends on ARM_AMBA || SOC_ZX296702 + depends on ARM_AMBA select SERIAL_CORE help This selects the ARM(R) AMBA(R) PrimeCell PL011 UART. If you have an Integrator/PP2, Integrator/CP or Versatile platform, say Y or M - here. Say Y or M if you have SOC_ZX296702. + here. If unsure, say N. diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 2af09ab153b6..fd27e986b1dd 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -74,13 +74,8 @@ /* There is by now at least one vendor with differing details, so handle it */ struct vendor_data { unsigned int ifls; - unsigned int fr_busy; - unsigned int fr_dsr; - unsigned int fr_cts; - unsigned int fr_ri; unsigned int lcrh_tx; unsigned int lcrh_rx; - u16 *reg_lut; bool oversampling; bool dma_threshold; bool cts_event_workaround; @@ -90,48 +85,6 @@ struct vendor_data { unsigned int (*get_fifosize)(struct amba_device *dev); }; -/* Max address offset of register in use is 0x48 */ -#define REG_NR (0x48 >> 2) -#define IDX(x) (x >> 2) -enum reg_idx { - REG_DR = IDX(UART01x_DR), - REG_RSR = IDX(UART01x_RSR), - REG_ST_DMAWM = IDX(ST_UART011_DMAWM), - REG_FR = IDX(UART01x_FR), - REG_ST_LCRH_RX = IDX(ST_UART011_LCRH_RX), - REG_ILPR = IDX(UART01x_ILPR), - REG_IBRD = IDX(UART011_IBRD), - REG_FBRD = IDX(UART011_FBRD), - REG_LCRH = IDX(UART011_LCRH), - REG_CR = IDX(UART011_CR), - REG_IFLS = IDX(UART011_IFLS), - REG_IMSC = IDX(UART011_IMSC), - REG_RIS = IDX(UART011_RIS), - REG_MIS = IDX(UART011_MIS), - REG_ICR = IDX(UART011_ICR), - REG_DMACR = IDX(UART011_DMACR), -}; - -static u16 arm_reg[] = { - [REG_DR] = UART01x_DR, - [REG_RSR] = UART01x_RSR, - [REG_ST_DMAWM] = ~0, - [REG_FR] = UART01x_FR, - [REG_ST_LCRH_RX] = ~0, - [REG_ILPR] = UART01x_ILPR, - [REG_IBRD] = UART011_IBRD, - [REG_FBRD] = UART011_FBRD, - [REG_LCRH] = UART011_LCRH, - [REG_CR] = UART011_CR, - [REG_IFLS] = UART011_IFLS, - [REG_IMSC] = UART011_IMSC, - [REG_RIS] = UART011_RIS, - [REG_MIS] = UART011_MIS, - [REG_ICR] = UART011_ICR, - [REG_DMACR] = UART011_DMACR, -}; - -#ifdef CONFIG_ARM_AMBA static unsigned int get_fifosize_arm(struct amba_device *dev) { return amba_rev(dev) < 3 ? 16 : 32; @@ -139,13 +92,8 @@ static unsigned int get_fifosize_arm(struct amba_device *dev) static struct vendor_data vendor_arm = { .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, - .lcrh_tx = REG_LCRH, - .lcrh_rx = REG_LCRH, - .reg_lut = arm_reg, + .lcrh_tx = UART011_LCRH, + .lcrh_rx = UART011_LCRH, .oversampling = false, .dma_threshold = false, .cts_event_workaround = false, @@ -153,14 +101,8 @@ static struct vendor_data vendor_arm = { .fixed_options = false, .get_fifosize = get_fifosize_arm, }; -#endif static struct vendor_data vendor_sbsa = { - .fr_busy = UART01x_FR_BUSY, - .fr_dsr = UART01x_FR_DSR, - .fr_cts = UART01x_FR_CTS, - .fr_ri = UART011_FR_RI, - .reg_lut = arm_reg, .oversampling = false, .dma_threshold = false, .cts_event_workaround = false, @@ -168,26 +110,6 @@ static struct vendor_data vendor_sbsa = { .fixed_options = true, }; -#ifdef CONFIG_ARM_AMBA -static u16 st_reg[] = { - [REG_DR] = UART01x_DR, - [REG_RSR] = UART01x_RSR, - [REG_ST_DMAWM] = ST_UART011_DMAWM, - [REG_FR] = UART01x_FR, - [REG_ST_LCRH_RX] = ST_UART011_LCRH_RX, - [REG_ILPR] = UART01x_ILPR, - [REG_IBRD] = UART011_IBRD, - [REG_FBRD] = UART011_FBRD, - [REG_LCRH] = UART011_LCRH, - [REG_CR] = UART011_CR, - [REG_IFLS] = UART011_IFLS, - [REG_IMSC] = UART011_IMSC, - [REG_RIS] = UART011_RIS, - [REG_MIS] = UART011_MIS, - [REG_ICR] = UART011_ICR, - [REG_DMACR] = UART011_DMACR, -}; - static unsigned int get_fifosize_st(struct amba_device *dev) { return 64; @@ -195,13 +117,8 @@ static unsigned int get_fifosize_st(struct amba_device *dev) static struct vendor_data vendor_st = { .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, - .lcrh_tx = REG_LCRH, - .lcrh_rx = REG_ST_LCRH_RX, - .reg_lut = st_reg, + .lcrh_tx = ST_UART011_LCRH_TX, + .lcrh_rx = ST_UART011_LCRH_RX, .oversampling = true, .dma_threshold = true, .cts_event_workaround = true, @@ -209,43 +126,6 @@ static struct vendor_data vendor_st = { .fixed_options = false, .get_fifosize = get_fifosize_st, }; -#endif - -#ifdef CONFIG_SOC_ZX296702 -static u16 zte_reg[] = { - [REG_DR] = ZX_UART01x_DR, - [REG_RSR] = UART01x_RSR, - [REG_ST_DMAWM] = ST_UART011_DMAWM, - [REG_FR] = ZX_UART01x_FR, - [REG_ST_LCRH_RX] = ST_UART011_LCRH_RX, - [REG_ILPR] = UART01x_ILPR, - [REG_IBRD] = UART011_IBRD, - [REG_FBRD] = UART011_FBRD, - [REG_LCRH] = ZX_UART011_LCRH_TX, - [REG_CR] = ZX_UART011_CR, - [REG_IFLS] = ZX_UART011_IFLS, - [REG_IMSC] = ZX_UART011_IMSC, - [REG_RIS] = ZX_UART011_RIS, - [REG_MIS] = ZX_UART011_MIS, - [REG_ICR] = ZX_UART011_ICR, - [REG_DMACR] = ZX_UART011_DMACR, -}; - -static struct vendor_data vendor_zte = { - .ifls = UART011_IFLS_RX4_8|UART011_IFLS_TX4_8, - .fr_busy = ZX_UART01x_FR_BUSY, - .fr_dsr = ZX_UART01x_FR_DSR, - .fr_cts = ZX_UART01x_FR_CTS, - .fr_ri = ZX_UART011_FR_RI, - .lcrh_tx = REG_LCRH, - .lcrh_rx = REG_ST_LCRH_RX, - .reg_lut = zte_reg, - .oversampling = false, - .dma_threshold = false, - .cts_event_workaround = false, - .fixed_options = false, -}; -#endif /* Deals with DMA transactions */ @@ -284,15 +164,10 @@ struct uart_amba_port { struct uart_port port; struct clk *clk; const struct vendor_data *vendor; - u16 *reg_lut; unsigned int dmacr; /* dma control reg */ unsigned int im; /* interrupt mask */ unsigned int old_status; unsigned int fifosize; /* vendor-specific */ - unsigned int fr_busy; /* vendor-specific */ - unsigned int fr_dsr; /* vendor-specific */ - unsigned int fr_cts; /* vendor-specific */ - unsigned int fr_ri; /* vendor-specific */ unsigned int lcrh_tx; /* vendor-specific */ unsigned int lcrh_rx; /* vendor-specific */ unsigned int old_cr; /* state during shutdown */ @@ -309,29 +184,6 @@ struct uart_amba_port { #endif }; -static bool is_implemented(struct uart_amba_port *uap, unsigned int reg) -{ - return uap->reg_lut[reg] != (u16)~0; -} - -static unsigned int pl011_readw(struct uart_amba_port *uap, int index) -{ - WARN_ON(index > REG_NR); - return readw_relaxed(uap->port.membase + uap->reg_lut[index]); -} - -static void pl011_writew(struct uart_amba_port *uap, int val, int index) -{ - WARN_ON(index > REG_NR); - writew_relaxed(val, uap->port.membase + uap->reg_lut[index]); -} - -static void pl011_writeb(struct uart_amba_port *uap, u8 val, int index) -{ - WARN_ON(index > REG_NR); - writeb_relaxed(val, uap->port.membase + uap->reg_lut[index]); -} - /* * Reads up to 256 characters from the FIFO or until it's empty and * inserts them into the TTY layer. Returns the number of characters @@ -344,12 +196,12 @@ static int pl011_fifo_to_tty(struct uart_amba_port *uap) int fifotaken = 0; while (max_count--) { - status = pl011_readw(uap, REG_FR); + status = readw(uap->port.membase + UART01x_FR); if (status & UART01x_FR_RXFE) break; /* Take chars from the FIFO and update status */ - ch = pl011_readw(uap, REG_DR) | + ch = readw(uap->port.membase + UART01x_DR) | UART_DUMMY_DR_RX; flag = TTY_NORMAL; uap->port.icount.rx++; @@ -432,7 +284,7 @@ static void pl011_dma_probe(struct uart_amba_port *uap) struct amba_pl011_data *plat = dev_get_platdata(uap->port.dev); struct device *dev = uap->port.dev; struct dma_slave_config tx_conf = { - .dst_addr = uap->port.mapbase + uap->reg_lut[REG_DR], + .dst_addr = uap->port.mapbase + UART01x_DR, .dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE, .direction = DMA_MEM_TO_DEV, .dst_maxburst = uap->fifosize >> 1, @@ -487,7 +339,7 @@ static void pl011_dma_probe(struct uart_amba_port *uap) if (chan) { struct dma_slave_config rx_conf = { - .src_addr = uap->port.mapbase + uap->reg_lut[REG_DR], + .src_addr = uap->port.mapbase + UART01x_DR, .src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE, .direction = DMA_DEV_TO_MEM, .src_maxburst = uap->fifosize >> 2, @@ -586,7 +438,7 @@ static void pl011_dma_tx_callback(void *data) dmacr = uap->dmacr; uap->dmacr = dmacr & ~UART011_TXDMAE; - pl011_writew(uap, uap->dmacr, REG_DMACR); + writew(uap->dmacr, uap->port.membase + UART011_DMACR); /* * If TX DMA was disabled, it means that we've stopped the DMA for @@ -700,7 +552,7 @@ static int pl011_dma_tx_refill(struct uart_amba_port *uap) dma_dev->device_issue_pending(chan); uap->dmacr |= UART011_TXDMAE; - pl011_writew(uap, uap->dmacr, REG_DMACR); + writew(uap->dmacr, uap->port.membase + UART011_DMACR); uap->dmatx.queued = true; /* @@ -736,9 +588,9 @@ static bool pl011_dma_tx_irq(struct uart_amba_port *uap) */ if (uap->dmatx.queued) { uap->dmacr |= UART011_TXDMAE; - pl011_writew(uap, uap->dmacr, REG_DMACR); + writew(uap->dmacr, uap->port.membase + UART011_DMACR); uap->im &= ~UART011_TXIM; - pl011_writew(uap, uap->im, REG_IMSC); + writew(uap->im, uap->port.membase + UART011_IMSC); return true; } @@ -748,7 +600,7 @@ static bool pl011_dma_tx_irq(struct uart_amba_port *uap) */ if (pl011_dma_tx_refill(uap) > 0) { uap->im &= ~UART011_TXIM; - pl011_writew(uap, uap->im, REG_IMSC); + writew(uap->im, uap->port.membase + UART011_IMSC); return true; } return false; @@ -762,7 +614,7 @@ static inline void pl011_dma_tx_stop(struct uart_amba_port *uap) { if (uap->dmatx.queued) { uap->dmacr &= ~UART011_TXDMAE; - pl011_writew(uap, uap->dmacr, REG_DMACR); + writew(uap->dmacr, uap->port.membase + UART011_DMACR); } } @@ -788,12 +640,14 @@ static inline bool pl011_dma_tx_start(struct uart_amba_port *uap) if (!uap->dmatx.queued) { if (pl011_dma_tx_refill(uap) > 0) { uap->im &= ~UART011_TXIM; - pl011_writew(uap, uap->im, REG_IMSC); + writew(uap->im, uap->port.membase + + UART011_IMSC); } else ret = false; } else if (!(uap->dmacr & UART011_TXDMAE)) { uap->dmacr |= UART011_TXDMAE; - pl011_writew(uap, uap->dmacr, REG_DMACR); + writew(uap->dmacr, + uap->port.membase + UART011_DMACR); } return ret; } @@ -804,9 +658,9 @@ static inline bool pl011_dma_tx_start(struct uart_amba_port *uap) */ dmacr = uap->dmacr; uap->dmacr &= ~UART011_TXDMAE; - pl011_writew(uap, uap->dmacr, REG_DMACR); + writew(uap->dmacr, uap->port.membase + UART011_DMACR); - if (pl011_readw(uap, REG_FR) & UART01x_FR_TXFF) { + if (readw(uap->port.membase + UART01x_FR) & UART01x_FR_TXFF) { /* * No space in the FIFO, so enable the transmit interrupt * so we know when there is space. Note that once we've @@ -815,13 +669,13 @@ static inline bool pl011_dma_tx_start(struct uart_amba_port *uap) return false; } - pl011_writew(uap, uap->port.x_char, REG_DR); + writew(uap->port.x_char, uap->port.membase + UART01x_DR); uap->port.icount.tx++; uap->port.x_char = 0; /* Success - restore the DMA state */ uap->dmacr = dmacr; - pl011_writew(uap, dmacr, REG_DMACR); + writew(dmacr, uap->port.membase + UART011_DMACR); return true; } @@ -849,7 +703,7 @@ __acquires(&uap->port.lock) DMA_TO_DEVICE); uap->dmatx.queued = false; uap->dmacr &= ~UART011_TXDMAE; - pl011_writew(uap, uap->dmacr, REG_DMACR); + writew(uap->dmacr, uap->port.membase + UART011_DMACR); } } @@ -889,11 +743,11 @@ static int pl011_dma_rx_trigger_dma(struct uart_amba_port *uap) dma_async_issue_pending(rxchan); uap->dmacr |= UART011_RXDMAE; - pl011_writew(uap, uap->dmacr, REG_DMACR); + writew(uap->dmacr, uap->port.membase + UART011_DMACR); uap->dmarx.running = true; uap->im &= ~UART011_RXIM; - pl011_writew(uap, uap->im, REG_IMSC); + writew(uap->im, uap->port.membase + UART011_IMSC); return 0; } @@ -951,9 +805,8 @@ static void pl011_dma_rx_chars(struct uart_amba_port *uap, */ if (dma_count == pending && readfifo) { /* Clear any error flags */ - pl011_writew(uap, - UART011_OEIS | UART011_BEIS | UART011_PEIS - | UART011_FEIS, REG_ICR); + writew(UART011_OEIS | UART011_BEIS | UART011_PEIS | UART011_FEIS, + uap->port.membase + UART011_ICR); /* * If we read all the DMA'd characters, and we had an @@ -1001,7 +854,7 @@ static void pl011_dma_rx_irq(struct uart_amba_port *uap) /* Disable RX DMA - incoming data will wait in the FIFO */ uap->dmacr &= ~UART011_RXDMAE; - pl011_writew(uap, uap->dmacr, REG_DMACR); + writew(uap->dmacr, uap->port.membase + UART011_DMACR); uap->dmarx.running = false; pending = sgbuf->sg.length - state.residue; @@ -1021,7 +874,7 @@ static void pl011_dma_rx_irq(struct uart_amba_port *uap) dev_dbg(uap->port.dev, "could not retrigger RX DMA job " "fall back to interrupt mode\n"); uap->im |= UART011_RXIM; - pl011_writew(uap, uap->im, REG_IMSC); + writew(uap->im, uap->port.membase + UART011_IMSC); } } @@ -1069,7 +922,7 @@ static void pl011_dma_rx_callback(void *data) dev_dbg(uap->port.dev, "could not retrigger RX DMA job " "fall back to interrupt mode\n"); uap->im |= UART011_RXIM; - pl011_writew(uap, uap->im, REG_IMSC); + writew(uap->im, uap->port.membase + UART011_IMSC); } } @@ -1082,7 +935,7 @@ static inline void pl011_dma_rx_stop(struct uart_amba_port *uap) { /* FIXME. Just disable the DMA enable */ uap->dmacr &= ~UART011_RXDMAE; - pl011_writew(uap, uap->dmacr, REG_DMACR); + writew(uap->dmacr, uap->port.membase + UART011_DMACR); } /* @@ -1126,7 +979,7 @@ static void pl011_dma_rx_poll(unsigned long args) spin_lock_irqsave(&uap->port.lock, flags); pl011_dma_rx_stop(uap); uap->im |= UART011_RXIM; - pl011_writew(uap, uap->im, REG_IMSC); + writew(uap->im, uap->port.membase + UART011_IMSC); spin_unlock_irqrestore(&uap->port.lock, flags); uap->dmarx.running = false; @@ -1188,7 +1041,7 @@ static void pl011_dma_startup(struct uart_amba_port *uap) skip_rx: /* Turn on DMA error (RX/TX will be enabled on demand) */ uap->dmacr |= UART011_DMAONERR; - pl011_writew(uap, uap->dmacr, REG_DMACR); + writew(uap->dmacr, uap->port.membase + UART011_DMACR); /* * ST Micro variants has some specific dma burst threshold @@ -1196,9 +1049,8 @@ skip_rx: * be issued above/below 16 bytes. */ if (uap->vendor->dma_threshold) - pl011_writew(uap, - ST_UART011_DMAWM_RX_16 | ST_UART011_DMAWM_TX_16, - REG_ST_DMAWM); + writew(ST_UART011_DMAWM_RX_16 | ST_UART011_DMAWM_TX_16, + uap->port.membase + ST_UART011_DMAWM); if (uap->using_rx_dma) { if (pl011_dma_rx_trigger_dma(uap)) @@ -1223,12 +1075,12 @@ static void pl011_dma_shutdown(struct uart_amba_port *uap) return; /* Disable RX and TX DMA */ - while (pl011_readw(uap, REG_FR) & uap->fr_busy) + while (readw(uap->port.membase + UART01x_FR) & UART01x_FR_BUSY) barrier(); spin_lock_irq(&uap->port.lock); uap->dmacr &= ~(UART011_DMAONERR | UART011_RXDMAE | UART011_TXDMAE); - pl011_writew(uap, uap->dmacr, REG_DMACR); + writew(uap->dmacr, uap->port.membase + UART011_DMACR); spin_unlock_irq(&uap->port.lock); if (uap->using_tx_dma) { @@ -1329,7 +1181,7 @@ static void pl011_stop_tx(struct uart_port *port) container_of(port, struct uart_amba_port, port); uap->im &= ~UART011_TXIM; - pl011_writew(uap, uap->im, REG_IMSC); + writew(uap->im, uap->port.membase + UART011_IMSC); pl011_dma_tx_stop(uap); } @@ -1339,7 +1191,7 @@ static void pl011_tx_chars(struct uart_amba_port *uap, bool from_irq); static void pl011_start_tx_pio(struct uart_amba_port *uap) { uap->im |= UART011_TXIM; - pl011_writew(uap, uap->im, REG_IMSC); + writew(uap->im, uap->port.membase + UART011_IMSC); pl011_tx_chars(uap, false); } @@ -1359,7 +1211,7 @@ static void pl011_stop_rx(struct uart_port *port) uap->im &= ~(UART011_RXIM|UART011_RTIM|UART011_FEIM| UART011_PEIM|UART011_BEIM|UART011_OEIM); - pl011_writew(uap, uap->im, REG_IMSC); + writew(uap->im, uap->port.membase + UART011_IMSC); pl011_dma_rx_stop(uap); } @@ -1370,7 +1222,7 @@ static void pl011_enable_ms(struct uart_port *port) container_of(port, struct uart_amba_port, port); uap->im |= UART011_RIMIM|UART011_CTSMIM|UART011_DCDMIM|UART011_DSRMIM; - pl011_writew(uap, uap->im, REG_IMSC); + writew(uap->im, uap->port.membase + UART011_IMSC); } static void pl011_rx_chars(struct uart_amba_port *uap) @@ -1390,7 +1242,7 @@ __acquires(&uap->port.lock) dev_dbg(uap->port.dev, "could not trigger RX DMA job " "fall back to interrupt mode again\n"); uap->im |= UART011_RXIM; - pl011_writew(uap, uap->im, REG_IMSC); + writew(uap->im, uap->port.membase + UART011_IMSC); } else { #ifdef CONFIG_DMA_ENGINE /* Start Rx DMA poll */ @@ -1411,10 +1263,10 @@ static bool pl011_tx_char(struct uart_amba_port *uap, unsigned char c, bool from_irq) { if (unlikely(!from_irq) && - pl011_readw(uap, REG_FR) & UART01x_FR_TXFF) + readw(uap->port.membase + UART01x_FR) & UART01x_FR_TXFF) return false; /* unable to transmit character */ - pl011_writew(uap, c, REG_DR); + writew(c, uap->port.membase + UART01x_DR); uap->port.icount.tx++; return true; @@ -1461,7 +1313,7 @@ static void pl011_modem_status(struct uart_amba_port *uap) { unsigned int status, delta; - status = pl011_readw(uap, REG_FR) & UART01x_FR_MODEM_ANY; + status = readw(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY; delta = status ^ uap->old_status; uap->old_status = status; @@ -1472,11 +1324,11 @@ 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 & uap->fr_dsr) + if (delta & UART01x_FR_DSR) uap->port.icount.dsr++; - if (delta & uap->fr_cts) - uart_handle_cts_change(&uap->port, status & uap->fr_cts); + if (delta & UART01x_FR_CTS) + uart_handle_cts_change(&uap->port, status & UART01x_FR_CTS); wake_up_interruptible(&uap->port.state->port.delta_msr_wait); } @@ -1489,15 +1341,15 @@ static void check_apply_cts_event_workaround(struct uart_amba_port *uap) return; /* workaround to make sure that all bits are unlocked.. */ - pl011_writew(uap, 0x00, REG_ICR); + writew(0x00, uap->port.membase + UART011_ICR); /* * WA: introduce 26ns(1 uart clk) delay before W1C; * single apb access will incur 2 pclk(133.12Mhz) delay, * so add 2 dummy reads */ - dummy_read = pl011_readw(uap, REG_ICR); - dummy_read = pl011_readw(uap, REG_ICR); + dummy_read = readw(uap->port.membase + UART011_ICR); + dummy_read = readw(uap->port.membase + UART011_ICR); } static irqreturn_t pl011_int(int irq, void *dev_id) @@ -1509,13 +1361,15 @@ static irqreturn_t pl011_int(int irq, void *dev_id) int handled = 0; spin_lock_irqsave(&uap->port.lock, flags); - imsc = pl011_readw(uap, REG_IMSC); - status = pl011_readw(uap, REG_RIS) & imsc; + imsc = readw(uap->port.membase + UART011_IMSC); + status = readw(uap->port.membase + UART011_RIS) & imsc; if (status) { do { check_apply_cts_event_workaround(uap); - pl011_writew(uap, status & ~(UART011_TXIS|UART011_RTIS| - UART011_RXIS), REG_ICR); + + writew(status & ~(UART011_TXIS|UART011_RTIS| + UART011_RXIS), + uap->port.membase + UART011_ICR); if (status & (UART011_RTIS|UART011_RXIS)) { if (pl011_dma_rx_running(uap)) @@ -1532,7 +1386,7 @@ static irqreturn_t pl011_int(int irq, void *dev_id) if (pass_counter-- == 0) break; - status = pl011_readw(uap, REG_RIS) & imsc; + status = readw(uap->port.membase + UART011_RIS) & imsc; } while (status != 0); handled = 1; } @@ -1546,8 +1400,8 @@ 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_readw(uap, REG_FR); - return status & (uap->fr_busy|UART01x_FR_TXFF) ? 0 : TIOCSER_TEMT; + unsigned int status = readw(uap->port.membase + UART01x_FR); + return status & (UART01x_FR_BUSY|UART01x_FR_TXFF) ? 0 : TIOCSER_TEMT; } static unsigned int pl011_get_mctrl(struct uart_port *port) @@ -1555,16 +1409,16 @@ static unsigned int pl011_get_mctrl(struct uart_port *port) struct uart_amba_port *uap = container_of(port, struct uart_amba_port, port); unsigned int result = 0; - unsigned int status = pl011_readw(uap, REG_FR); + unsigned int status = readw(uap->port.membase + UART01x_FR); #define TIOCMBIT(uartbit, tiocmbit) \ if (status & uartbit) \ result |= tiocmbit TIOCMBIT(UART01x_FR_DCD, TIOCM_CAR); - TIOCMBIT(uap->fr_dsr, TIOCM_DSR); - TIOCMBIT(uap->fr_cts, TIOCM_CTS); - TIOCMBIT(uap->fr_ri, TIOCM_RNG); + TIOCMBIT(UART01x_FR_DSR, TIOCM_DSR); + TIOCMBIT(UART01x_FR_CTS, TIOCM_CTS); + TIOCMBIT(UART011_FR_RI, TIOCM_RNG); #undef TIOCMBIT return result; } @@ -1575,7 +1429,7 @@ static void pl011_set_mctrl(struct uart_port *port, unsigned int mctrl) container_of(port, struct uart_amba_port, port); unsigned int cr; - cr = pl011_readw(uap, REG_CR); + cr = readw(uap->port.membase + UART011_CR); #define TIOCMBIT(tiocmbit, uartbit) \ if (mctrl & tiocmbit) \ @@ -1595,7 +1449,7 @@ static void pl011_set_mctrl(struct uart_port *port, unsigned int mctrl) } #undef TIOCMBIT - pl011_writew(uap, cr, REG_CR); + writew(cr, uap->port.membase + UART011_CR); } static void pl011_break_ctl(struct uart_port *port, int break_state) @@ -1606,12 +1460,12 @@ static void pl011_break_ctl(struct uart_port *port, int break_state) unsigned int lcr_h; spin_lock_irqsave(&uap->port.lock, flags); - lcr_h = pl011_readw(uap, uap->lcrh_tx); + lcr_h = readw(uap->port.membase + uap->lcrh_tx); if (break_state == -1) lcr_h |= UART01x_LCRH_BRK; else lcr_h &= ~UART01x_LCRH_BRK; - pl011_writew(uap, lcr_h, uap->lcrh_tx); + writew(lcr_h, uap->port.membase + uap->lcrh_tx); spin_unlock_irqrestore(&uap->port.lock, flags); } @@ -1621,8 +1475,9 @@ static void pl011_quiesce_irqs(struct uart_port *port) { struct uart_amba_port *uap = container_of(port, struct uart_amba_port, port); + unsigned char __iomem *regs = uap->port.membase; - pl011_writew(uap, pl011_readw(uap, REG_MIS), REG_ICR); + writew(readw(regs + UART011_MIS), regs + UART011_ICR); /* * There is no way to clear TXIM as this is "ready to transmit IRQ", so * we simply mask it. start_tx() will unmask it. @@ -1636,7 +1491,7 @@ static void pl011_quiesce_irqs(struct uart_port *port) * (including tx queue), so we're also fine with start_tx()'s caller * side. */ - pl011_writew(uap, pl011_readw(uap, REG_IMSC) & ~UART011_TXIM, REG_IMSC); + writew(readw(regs + UART011_IMSC) & ~UART011_TXIM, regs + UART011_IMSC); } static int pl011_get_poll_char(struct uart_port *port) @@ -1651,11 +1506,11 @@ static int pl011_get_poll_char(struct uart_port *port) */ pl011_quiesce_irqs(port); - status = pl011_readw(uap, REG_FR); + status = readw(uap->port.membase + UART01x_FR); if (status & UART01x_FR_RXFE) return NO_POLL_CHAR; - return pl011_readw(uap, REG_DR); + return readw(uap->port.membase + UART01x_DR); } static void pl011_put_poll_char(struct uart_port *port, @@ -1664,10 +1519,10 @@ static void pl011_put_poll_char(struct uart_port *port, struct uart_amba_port *uap = container_of(port, struct uart_amba_port, port); - while (pl011_readw(uap, REG_FR) & UART01x_FR_TXFF) + while (readw(uap->port.membase + UART01x_FR) & UART01x_FR_TXFF) barrier(); - pl011_writew(uap, ch, REG_DR); + writew(ch, uap->port.membase + UART01x_DR); } #endif /* CONFIG_CONSOLE_POLL */ @@ -1691,15 +1546,15 @@ static int pl011_hwinit(struct uart_port *port) uap->port.uartclk = clk_get_rate(uap->clk); /* Clear pending error and receive interrupts */ - pl011_writew(uap, UART011_OEIS | UART011_BEIS | UART011_PEIS | - UART011_FEIS | UART011_RTIS | UART011_RXIS, REG_ICR); + writew(UART011_OEIS | UART011_BEIS | UART011_PEIS | UART011_FEIS | + UART011_RTIS | UART011_RXIS, uap->port.membase + UART011_ICR); /* * Save interrupts enable mask, and enable RX interrupts in case if * the interrupt is used for NMI entry. */ - uap->im = pl011_readw(uap, REG_IMSC); - pl011_writew(uap, UART011_RTIM | UART011_RXIM, REG_IMSC); + uap->im = readw(uap->port.membase + UART011_IMSC); + writew(UART011_RTIM | UART011_RXIM, uap->port.membase + UART011_IMSC); if (dev_get_platdata(uap->port.dev)) { struct amba_pl011_data *plat; @@ -1713,22 +1568,22 @@ static int pl011_hwinit(struct uart_port *port) static void pl011_write_lcr_h(struct uart_amba_port *uap, unsigned int lcr_h) { - pl011_writew(uap, lcr_h, uap->lcrh_rx); - if (is_implemented(uap, REG_ST_LCRH_RX)) { + writew(lcr_h, uap->port.membase + uap->lcrh_rx); + if (uap->lcrh_rx != uap->lcrh_tx) { int i; /* * Wait 10 PCLKs before writing LCRH_TX register, * to get this delay write read only register 10 times */ for (i = 0; i < 10; ++i) - pl011_writew(uap, 0xff, REG_MIS); - pl011_writew(uap, lcr_h, uap->lcrh_tx); + writew(0xff, uap->port.membase + UART011_MIS); + writew(lcr_h, uap->port.membase + uap->lcrh_tx); } } static int pl011_allocate_irq(struct uart_amba_port *uap) { - pl011_writew(uap, uap->im, REG_IMSC); + writew(uap->im, uap->port.membase + UART011_IMSC); return request_irq(uap->port.irq, pl011_int, 0, "uart-pl011", uap); } @@ -1743,11 +1598,12 @@ static void pl011_enable_interrupts(struct uart_amba_port *uap) spin_lock_irq(&uap->port.lock); /* Clear out any spuriously appearing RX interrupts */ - pl011_writew(uap, UART011_RTIS | UART011_RXIS, REG_ICR); + writew(UART011_RTIS | UART011_RXIS, + uap->port.membase + UART011_ICR); uap->im = UART011_RTIM; if (!pl011_dma_rx_running(uap)) uap->im |= UART011_RXIM; - pl011_writew(uap, uap->im, REG_IMSC); + writew(uap->im, uap->port.membase + UART011_IMSC); spin_unlock_irq(&uap->port.lock); } @@ -1766,21 +1622,21 @@ static int pl011_startup(struct uart_port *port) if (retval) goto clk_dis; - pl011_writew(uap, uap->vendor->ifls, REG_IFLS); + writew(uap->vendor->ifls, uap->port.membase + UART011_IFLS); spin_lock_irq(&uap->port.lock); /* restore RTS and DTR */ cr = uap->old_cr & (UART011_CR_RTS | UART011_CR_DTR); cr |= UART01x_CR_UARTEN | UART011_CR_RXE | UART011_CR_TXE; - pl011_writew(uap, cr, REG_CR); + writew(cr, uap->port.membase + UART011_CR); spin_unlock_irq(&uap->port.lock); /* * initialise the old status of the modem signals */ - uap->old_status = pl011_readw(uap, REG_FR) & UART01x_FR_MODEM_ANY; + uap->old_status = readw(uap->port.membase + UART01x_FR) & UART01x_FR_MODEM_ANY; /* Startup DMA */ pl011_dma_startup(uap); @@ -1819,11 +1675,11 @@ static int sbsa_uart_startup(struct uart_port *port) static void pl011_shutdown_channel(struct uart_amba_port *uap, unsigned int lcrh) { - unsigned long val; + unsigned long val; - val = pl011_readw(uap, lcrh); - val &= ~(UART01x_LCRH_BRK | UART01x_LCRH_FEN); - pl011_writew(uap, val, lcrh); + val = readw(uap->port.membase + lcrh); + val &= ~(UART01x_LCRH_BRK | UART01x_LCRH_FEN); + writew(val, uap->port.membase + lcrh); } /* @@ -1837,18 +1693,18 @@ static void pl011_disable_uart(struct uart_amba_port *uap) uap->autorts = false; spin_lock_irq(&uap->port.lock); - cr = pl011_readw(uap, REG_CR); + cr = readw(uap->port.membase + UART011_CR); uap->old_cr = cr; cr &= UART011_CR_RTS | UART011_CR_DTR; cr |= UART01x_CR_UARTEN | UART011_CR_TXE; - pl011_writew(uap, cr, REG_CR); + writew(cr, uap->port.membase + UART011_CR); spin_unlock_irq(&uap->port.lock); /* * disable break condition and fifos */ pl011_shutdown_channel(uap, uap->lcrh_rx); - if (is_implemented(uap, REG_ST_LCRH_RX)) + if (uap->lcrh_rx != uap->lcrh_tx) pl011_shutdown_channel(uap, uap->lcrh_tx); } @@ -1858,8 +1714,8 @@ static void pl011_disable_interrupts(struct uart_amba_port *uap) /* mask all interrupts and clear all pending ones */ uap->im = 0; - pl011_writew(uap, uap->im, REG_IMSC); - pl011_writew(uap, 0xffff, REG_ICR); + writew(uap->im, uap->port.membase + UART011_IMSC); + writew(0xffff, uap->port.membase + UART011_ICR); spin_unlock_irq(&uap->port.lock); } @@ -2011,8 +1867,8 @@ pl011_set_termios(struct uart_port *port, struct ktermios *termios, pl011_enable_ms(port); /* first, disable everything */ - old_cr = pl011_readw(uap, REG_CR); - pl011_writew(uap, 0, REG_CR); + old_cr = readw(port->membase + UART011_CR); + writew(0, port->membase + UART011_CR); if (termios->c_cflag & CRTSCTS) { if (old_cr & UART011_CR_RTS) @@ -2045,17 +1901,17 @@ pl011_set_termios(struct uart_port *port, struct ktermios *termios, quot -= 2; } /* Set baud rate */ - pl011_writew(uap, quot & 0x3f, REG_FBRD); - pl011_writew(uap, quot >> 6, REG_IBRD); + writew(quot & 0x3f, port->membase + UART011_FBRD); + writew(quot >> 6, port->membase + UART011_IBRD); /* * ----------v----------v----------v----------v----- * NOTE: lcrh_tx and lcrh_rx MUST BE WRITTEN AFTER - * REG_FBRD & REG_IBRD. + * UART011_FBRD & UART011_IBRD. * ----------^----------^----------^----------^----- */ pl011_write_lcr_h(uap, lcr_h); - pl011_writew(uap, old_cr, REG_CR); + writew(old_cr, port->membase + UART011_CR); spin_unlock_irqrestore(&port->lock, flags); } @@ -2196,9 +2052,9 @@ static void pl011_console_putchar(struct uart_port *port, int ch) struct uart_amba_port *uap = container_of(port, struct uart_amba_port, port); - while (pl011_readw(uap, REG_FR) & UART01x_FR_TXFF) + while (readw(uap->port.membase + UART01x_FR) & UART01x_FR_TXFF) barrier(); - pl011_writew(uap, ch, REG_DR); + writew(ch, uap->port.membase + UART01x_DR); } static void @@ -2223,10 +2079,10 @@ pl011_console_write(struct console *co, const char *s, unsigned int count) * First save the CR then disable the interrupts */ if (!uap->vendor->always_enabled) { - old_cr = pl011_readw(uap, REG_CR); + old_cr = readw(uap->port.membase + UART011_CR); new_cr = old_cr & ~UART011_CR_CTSEN; new_cr |= UART01x_CR_UARTEN | UART011_CR_TXE; - pl011_writew(uap, new_cr, REG_CR); + writew(new_cr, uap->port.membase + UART011_CR); } uart_console_write(&uap->port, s, count, pl011_console_putchar); @@ -2236,10 +2092,10 @@ pl011_console_write(struct console *co, const char *s, unsigned int count) * and restore the TCR */ do { - status = pl011_readw(uap, REG_FR); - } while (status & uap->fr_busy); + status = readw(uap->port.membase + UART01x_FR); + } while (status & UART01x_FR_BUSY); if (!uap->vendor->always_enabled) - pl011_writew(uap, old_cr, REG_CR); + writew(old_cr, uap->port.membase + UART011_CR); if (locked) spin_unlock(&uap->port.lock); @@ -2252,10 +2108,10 @@ static void __init pl011_console_get_options(struct uart_amba_port *uap, int *baud, int *parity, int *bits) { - if (pl011_readw(uap, REG_CR) & UART01x_CR_UARTEN) { + if (readw(uap->port.membase + UART011_CR) & UART01x_CR_UARTEN) { unsigned int lcr_h, ibrd, fbrd; - lcr_h = pl011_readw(uap, uap->lcrh_tx); + lcr_h = readw(uap->port.membase + uap->lcrh_tx); *parity = 'n'; if (lcr_h & UART01x_LCRH_PEN) { @@ -2270,13 +2126,13 @@ pl011_console_get_options(struct uart_amba_port *uap, int *baud, else *bits = 8; - ibrd = pl011_readw(uap, REG_IBRD); - fbrd = pl011_readw(uap, REG_FBRD); + ibrd = readw(uap->port.membase + UART011_IBRD); + fbrd = readw(uap->port.membase + UART011_FBRD); *baud = uap->port.uartclk * 4 / (64 * ibrd + fbrd); if (uap->vendor->oversampling) { - if (pl011_readw(uap, REG_CR) + if (readw(uap->port.membase + UART011_CR) & ST_UART011_CR_OVSFACT) *baud *= 2; } @@ -2348,13 +2204,10 @@ static struct console amba_console = { static void pl011_putc(struct uart_port *port, int c) { - struct uart_amba_port *uap = - container_of(port, struct uart_amba_port, port); - - while (pl011_readw(uap, REG_FR) & UART01x_FR_TXFF) + while (readl(port->membase + UART01x_FR) & UART01x_FR_TXFF) ; - pl011_writeb(uap, c, REG_DR); - while (pl011_readw(uap, REG_FR) & uap->fr_busy) + writeb(c, port->membase + UART01x_DR); + while (readl(port->membase + UART01x_FR) & UART01x_FR_BUSY) ; } @@ -2481,8 +2334,8 @@ static int pl011_register_port(struct uart_amba_port *uap) int ret; /* Ensure interrupts from this UART are masked and cleared */ - pl011_writew(uap, 0, REG_IMSC); - pl011_writew(uap, 0xffff, REG_ICR); + writew(0, uap->port.membase + UART011_IMSC); + writew(0xffff, uap->port.membase + UART011_ICR); if (!amba_reg.state) { ret = uart_register_driver(&amba_reg); @@ -2500,7 +2353,6 @@ static int pl011_register_port(struct uart_amba_port *uap) return ret; } -#ifdef CONFIG_ARM_AMBA static int pl011_probe(struct amba_device *dev, const struct amba_id *id) { struct uart_amba_port *uap; @@ -2521,13 +2373,8 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id) return PTR_ERR(uap->clk); uap->vendor = vendor; - uap->reg_lut = vendor->reg_lut; uap->lcrh_rx = vendor->lcrh_rx; uap->lcrh_tx = vendor->lcrh_tx; - uap->fr_busy = vendor->fr_busy; - uap->fr_dsr = vendor->fr_dsr; - uap->fr_cts = vendor->fr_cts; - uap->fr_ri = vendor->fr_ri; uap->fifosize = vendor->get_fifosize(dev); uap->port.irq = dev->irq[0]; uap->port.ops = &amba_pl011_pops; @@ -2551,67 +2398,6 @@ static int pl011_remove(struct amba_device *dev) pl011_unregister_port(uap); return 0; } -#endif - -#ifdef CONFIG_SOC_ZX296702 -static int zx_uart_probe(struct platform_device *pdev) -{ - struct uart_amba_port *uap; - struct vendor_data *vendor = &vendor_zte; - struct resource *res; - int portnr, ret; - - portnr = pl011_find_free_port(); - if (portnr < 0) - return portnr; - - uap = devm_kzalloc(&pdev->dev, sizeof(struct uart_amba_port), - GFP_KERNEL); - if (!uap) { - ret = -ENOMEM; - goto out; - } - - uap->clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(uap->clk)) { - ret = PTR_ERR(uap->clk); - goto out; - } - - uap->vendor = vendor; - uap->reg_lut = vendor->reg_lut; - uap->lcrh_rx = vendor->lcrh_rx; - uap->lcrh_tx = vendor->lcrh_tx; - uap->fr_busy = vendor->fr_busy; - uap->fr_dsr = vendor->fr_dsr; - uap->fr_cts = vendor->fr_cts; - uap->fr_ri = vendor->fr_ri; - uap->fifosize = 16; - uap->port.irq = platform_get_irq(pdev, 0); - uap->port.ops = &amba_pl011_pops; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - - ret = pl011_setup_port(&pdev->dev, uap, res, portnr); - if (ret) - return ret; - - platform_set_drvdata(pdev, uap); - - return pl011_register_port(uap); -out: - return ret; -} - -static int zx_uart_remove(struct platform_device *pdev) -{ - struct uart_amba_port *uap = platform_get_drvdata(pdev); - - uart_remove_one_port(&amba_reg, &uap->port); - pl011_unregister_port(uap); - return 0; -} -#endif #ifdef CONFIG_PM_SLEEP static int pl011_suspend(struct device *dev) @@ -2668,11 +2454,6 @@ static int sbsa_uart_probe(struct platform_device *pdev) return -ENOMEM; uap->vendor = &vendor_sbsa; - uap->reg_lut = vendor_sbsa.reg_lut; - uap->fr_busy = vendor_sbsa.fr_busy; - uap->fr_dsr = vendor_sbsa.fr_dsr; - uap->fr_cts = vendor_sbsa.fr_cts; - uap->fr_ri = vendor_sbsa.fr_ri; uap->fifosize = 32; uap->port.irq = platform_get_irq(pdev, 0); uap->port.ops = &sbsa_uart_pops; @@ -2722,7 +2503,6 @@ static struct platform_driver arm_sbsa_uart_platform_driver = { }, }; -#ifdef CONFIG_ARM_AMBA static struct amba_id pl011_ids[] = { { .id = 0x00041011, @@ -2748,57 +2528,20 @@ static struct amba_driver pl011_driver = { .probe = pl011_probe, .remove = pl011_remove, }; -#endif - -#ifdef CONFIG_SOC_ZX296702 -static const struct of_device_id zx_uart_dt_ids[] = { - { .compatible = "zte,zx296702-uart", }, - { /* sentinel */ } -}; -MODULE_DEVICE_TABLE(of, zx_uart_dt_ids); - -static struct platform_driver zx_uart_driver = { - .driver = { - .name = "zx-uart", - .owner = THIS_MODULE, - .pm = &pl011_dev_pm_ops, - .of_match_table = zx_uart_dt_ids, - }, - .probe = zx_uart_probe, - .remove = zx_uart_remove, -}; -#endif - static int __init pl011_init(void) { - int ret; printk(KERN_INFO "Serial: AMBA PL011 UART driver\n"); if (platform_driver_register(&arm_sbsa_uart_platform_driver)) pr_warn("could not register SBSA UART platform driver\n"); - -#ifdef CONFIG_SOC_ZX296702 - ret = platform_driver_register(&zx_uart_driver); - if (ret) - pr_warn("could not register ZX UART platform driver\n"); -#endif - -#ifdef CONFIG_ARM_AMBA - ret = amba_driver_register(&pl011_driver); -#endif - return ret; + return amba_driver_register(&pl011_driver); } static void __exit pl011_exit(void) { platform_driver_unregister(&arm_sbsa_uart_platform_driver); -#ifdef CONFIG_SOC_ZX296702 - platform_driver_unregister(&zx_uart_driver); -#endif -#ifdef CONFIG_ARM_AMBA amba_driver_unregister(&pl011_driver); -#endif } /* |