linux/drivers/tty/serial/stm32-usart.h

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tty: add SPDX identifiers to all remaining files in drivers/tty/ It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the drivers/tty files files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Jiri Slaby <jslaby@suse.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Chris Metcalf <cmetcalf@mellanox.com> Cc: Jiri Kosina <jikos@kernel.org> Cc: David Sterba <dsterba@suse.com> Cc: James Hogan <jhogan@kernel.org> Cc: Rob Herring <robh@kernel.org> Cc: Eric Anholt <eric@anholt.net> Cc: Stefan Wahren <stefan.wahren@i2se.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Ray Jui <rjui@broadcom.com> Cc: Scott Branden <sbranden@broadcom.com> Cc: bcm-kernel-feedback-list@broadcom.com Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Cc: Helge Deller <deller@gmx.de> Cc: Joachim Eastwood <manabian@gmail.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Tobias Klauser <tklauser@distanz.ch> Cc: Russell King <linux@armlinux.org.uk> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Richard Genoud <richard.genoud@gmail.com> Cc: Alexander Shiyan <shc_work@mail.ru> Cc: Baruch Siach <baruch@tkos.co.il> Cc: "Maciej W. Rozycki" <macro@linux-mips.org> Cc: "Uwe Kleine-König" <kernel@pengutronix.de> Cc: Pat Gefre <pfg@sgi.com> Cc: "Guilherme G. Piccoli" <gpiccoli@linux.vnet.ibm.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Vladimir Zapolskiy <vz@mleia.com> Cc: Sylvain Lemieux <slemieux.tyco@gmail.com> Cc: Carlo Caione <carlo@caione.org> Cc: Kevin Hilman <khilman@baylibre.com> Cc: Liviu Dudau <liviu.dudau@arm.com> Cc: Sudeep Holla <sudeep.holla@arm.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Andy Gross <andy.gross@linaro.org> Cc: David Brown <david.brown@linaro.org> Cc: "Andreas Färber" <afaerber@suse.de> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Laxman Dewangan <ldewangan@nvidia.com> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Jonathan Hunter <jonathanh@nvidia.com> Cc: Barry Song <baohua@kernel.org> Cc: Patrice Chotard <patrice.chotard@st.com> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com> Cc: Alexandre Torgue <alexandre.torgue@st.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Peter Korsgaard <jacmet@sunsite.dk> Cc: Timur Tabi <timur@tabi.org> Cc: Tony Prisk <linux@prisktech.co.nz> Cc: Michal Simek <michal.simek@xilinx.com> Cc: "Sören Brinkmann" <soren.brinkmann@xilinx.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Cc: Jiri Slaby <jslaby@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-06 17:11:51 +00:00
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) Maxime Coquelin 2015
* Copyright (C) STMicroelectronics SA 2017
* Authors: Maxime Coquelin <mcoquelin.stm32@gmail.com>
* Gerald Baeza <gerald_baeza@yahoo.fr>
*/
#define DRIVER_NAME "stm32-usart"
struct stm32_usart_offsets {
u8 cr1;
u8 cr2;
u8 cr3;
u8 brr;
u8 gtpr;
u8 rtor;
u8 rqr;
u8 isr;
u8 icr;
u8 rdr;
u8 tdr;
};
struct stm32_usart_config {
u8 uart_enable_bit; /* USART_CR1_UE */
bool has_7bits_data;
bool has_wakeup;
bool has_fifo;
};
struct stm32_usart_info {
struct stm32_usart_offsets ofs;
struct stm32_usart_config cfg;
};
#define UNDEF_REG 0xff
/* Register offsets */
struct stm32_usart_info stm32f4_info = {
.ofs = {
.isr = 0x00,
.rdr = 0x04,
.tdr = 0x04,
.brr = 0x08,
.cr1 = 0x0c,
.cr2 = 0x10,
.cr3 = 0x14,
.gtpr = 0x18,
.rtor = UNDEF_REG,
.rqr = UNDEF_REG,
.icr = UNDEF_REG,
},
.cfg = {
.uart_enable_bit = 13,
.has_7bits_data = false,
}
};
struct stm32_usart_info stm32f7_info = {
.ofs = {
.cr1 = 0x00,
.cr2 = 0x04,
.cr3 = 0x08,
.brr = 0x0c,
.gtpr = 0x10,
.rtor = 0x14,
.rqr = 0x18,
.isr = 0x1c,
.icr = 0x20,
.rdr = 0x24,
.tdr = 0x28,
},
.cfg = {
.uart_enable_bit = 0,
.has_7bits_data = true,
}
};
struct stm32_usart_info stm32h7_info = {
.ofs = {
.cr1 = 0x00,
.cr2 = 0x04,
.cr3 = 0x08,
.brr = 0x0c,
.gtpr = 0x10,
.rtor = 0x14,
.rqr = 0x18,
.isr = 0x1c,
.icr = 0x20,
.rdr = 0x24,
.tdr = 0x28,
},
.cfg = {
.uart_enable_bit = 0,
.has_7bits_data = true,
.has_wakeup = true,
.has_fifo = true,
}
};
/* USART_SR (F4) / USART_ISR (F7) */
#define USART_SR_PE BIT(0)
#define USART_SR_FE BIT(1)
#define USART_SR_NF BIT(2)
#define USART_SR_ORE BIT(3)
#define USART_SR_IDLE BIT(4)
#define USART_SR_RXNE BIT(5)
#define USART_SR_TC BIT(6)
#define USART_SR_TXE BIT(7)
#define USART_SR_LBD BIT(8)
#define USART_SR_CTSIF BIT(9)
#define USART_SR_CTS BIT(10) /* F7 */
#define USART_SR_RTOF BIT(11) /* F7 */
#define USART_SR_EOBF BIT(12) /* F7 */
#define USART_SR_ABRE BIT(14) /* F7 */
#define USART_SR_ABRF BIT(15) /* F7 */
#define USART_SR_BUSY BIT(16) /* F7 */
#define USART_SR_CMF BIT(17) /* F7 */
#define USART_SR_SBKF BIT(18) /* F7 */
#define USART_SR_WUF BIT(20) /* H7 */
#define USART_SR_TEACK BIT(21) /* F7 */
#define USART_SR_ERR_MASK (USART_SR_LBD | USART_SR_ORE | \
USART_SR_FE | USART_SR_PE)
/* Dummy bits */
#define USART_SR_DUMMY_RX BIT(16)
/* USART_ICR (F7) */
#define USART_CR_TC BIT(6)
/* USART_DR */
#define USART_DR_MASK GENMASK(8, 0)
/* USART_BRR */
#define USART_BRR_DIV_F_MASK GENMASK(3, 0)
#define USART_BRR_DIV_M_MASK GENMASK(15, 4)
#define USART_BRR_DIV_M_SHIFT 4
/* USART_CR1 */
#define USART_CR1_SBK BIT(0)
#define USART_CR1_RWU BIT(1) /* F4 */
#define USART_CR1_UESM BIT(1) /* H7 */
#define USART_CR1_RE BIT(2)
#define USART_CR1_TE BIT(3)
#define USART_CR1_IDLEIE BIT(4)
#define USART_CR1_RXNEIE BIT(5)
#define USART_CR1_TCIE BIT(6)
#define USART_CR1_TXEIE BIT(7)
#define USART_CR1_PEIE BIT(8)
#define USART_CR1_PS BIT(9)
#define USART_CR1_PCE BIT(10)
#define USART_CR1_WAKE BIT(11)
#define USART_CR1_M BIT(12)
#define USART_CR1_M0 BIT(12) /* F7 */
#define USART_CR1_MME BIT(13) /* F7 */
#define USART_CR1_CMIE BIT(14) /* F7 */
#define USART_CR1_OVER8 BIT(15)
#define USART_CR1_DEDT_MASK GENMASK(20, 16) /* F7 */
#define USART_CR1_DEAT_MASK GENMASK(25, 21) /* F7 */
#define USART_CR1_RTOIE BIT(26) /* F7 */
#define USART_CR1_EOBIE BIT(27) /* F7 */
#define USART_CR1_M1 BIT(28) /* F7 */
#define USART_CR1_IE_MASK (GENMASK(8, 4) | BIT(14) | BIT(26) | BIT(27))
#define USART_CR1_FIFOEN BIT(29) /* H7 */
/* USART_CR2 */
#define USART_CR2_ADD_MASK GENMASK(3, 0) /* F4 */
#define USART_CR2_ADDM7 BIT(4) /* F7 */
#define USART_CR2_LBDL BIT(5)
#define USART_CR2_LBDIE BIT(6)
#define USART_CR2_LBCL BIT(8)
#define USART_CR2_CPHA BIT(9)
#define USART_CR2_CPOL BIT(10)
#define USART_CR2_CLKEN BIT(11)
#define USART_CR2_STOP_2B BIT(13)
#define USART_CR2_STOP_MASK GENMASK(13, 12)
#define USART_CR2_LINEN BIT(14)
#define USART_CR2_SWAP BIT(15) /* F7 */
#define USART_CR2_RXINV BIT(16) /* F7 */
#define USART_CR2_TXINV BIT(17) /* F7 */
#define USART_CR2_DATAINV BIT(18) /* F7 */
#define USART_CR2_MSBFIRST BIT(19) /* F7 */
#define USART_CR2_ABREN BIT(20) /* F7 */
#define USART_CR2_ABRMOD_MASK GENMASK(22, 21) /* F7 */
#define USART_CR2_RTOEN BIT(23) /* F7 */
#define USART_CR2_ADD_F7_MASK GENMASK(31, 24) /* F7 */
/* USART_CR3 */
#define USART_CR3_EIE BIT(0)
#define USART_CR3_IREN BIT(1)
#define USART_CR3_IRLP BIT(2)
#define USART_CR3_HDSEL BIT(3)
#define USART_CR3_NACK BIT(4)
#define USART_CR3_SCEN BIT(5)
#define USART_CR3_DMAR BIT(6)
#define USART_CR3_DMAT BIT(7)
#define USART_CR3_RTSE BIT(8)
#define USART_CR3_CTSE BIT(9)
#define USART_CR3_CTSIE BIT(10)
#define USART_CR3_ONEBIT BIT(11)
#define USART_CR3_OVRDIS BIT(12) /* F7 */
#define USART_CR3_DDRE BIT(13) /* F7 */
#define USART_CR3_DEM BIT(14) /* F7 */
#define USART_CR3_DEP BIT(15) /* F7 */
#define USART_CR3_SCARCNT_MASK GENMASK(19, 17) /* F7 */
#define USART_CR3_WUS_MASK GENMASK(21, 20) /* H7 */
#define USART_CR3_WUS_START_BIT BIT(21) /* H7 */
#define USART_CR3_WUFIE BIT(22) /* H7 */
/* USART_GTPR */
#define USART_GTPR_PSC_MASK GENMASK(7, 0)
#define USART_GTPR_GT_MASK GENMASK(15, 8)
/* USART_RTOR */
#define USART_RTOR_RTO_MASK GENMASK(23, 0) /* F7 */
#define USART_RTOR_BLEN_MASK GENMASK(31, 24) /* F7 */
/* USART_RQR */
#define USART_RQR_ABRRQ BIT(0) /* F7 */
#define USART_RQR_SBKRQ BIT(1) /* F7 */
#define USART_RQR_MMRQ BIT(2) /* F7 */
#define USART_RQR_RXFRQ BIT(3) /* F7 */
#define USART_RQR_TXFRQ BIT(4) /* F7 */
/* USART_ICR */
#define USART_ICR_PECF BIT(0) /* F7 */
#define USART_ICR_FFECF BIT(1) /* F7 */
#define USART_ICR_NCF BIT(2) /* F7 */
#define USART_ICR_ORECF BIT(3) /* F7 */
#define USART_ICR_IDLECF BIT(4) /* F7 */
#define USART_ICR_TCCF BIT(6) /* F7 */
#define USART_ICR_LBDCF BIT(8) /* F7 */
#define USART_ICR_CTSCF BIT(9) /* F7 */
#define USART_ICR_RTOCF BIT(11) /* F7 */
#define USART_ICR_EOBCF BIT(12) /* F7 */
#define USART_ICR_CMCF BIT(17) /* F7 */
#define USART_ICR_WUCF BIT(20) /* H7 */
#define STM32_SERIAL_NAME "ttyS"
#define STM32_MAX_PORTS 8
#define RX_BUF_L 200 /* dma rx buffer length */
#define RX_BUF_P RX_BUF_L /* dma rx buffer period */
#define TX_BUF_L 200 /* dma tx buffer length */
struct stm32_port {
struct uart_port port;
struct clk *clk;
struct stm32_usart_info *info;
struct dma_chan *rx_ch; /* dma rx channel */
dma_addr_t rx_dma_buf; /* dma rx buffer bus address */
unsigned char *rx_buf; /* dma rx buffer cpu address */
struct dma_chan *tx_ch; /* dma tx channel */
dma_addr_t tx_dma_buf; /* dma tx buffer bus address */
unsigned char *tx_buf; /* dma tx buffer cpu address */
int last_res;
bool tx_dma_busy; /* dma tx busy */
bool hw_flow_control;
bool fifoen;
int wakeirq;
};
static struct stm32_port stm32_ports[STM32_MAX_PORTS];
static struct uart_driver stm32_usart_driver;