From 301e4a2a119f0904354bef2ba62e187f026fb261 Mon Sep 17 00:00:00 2001 From: Patrick Wildt Date: Sun, 6 Nov 2022 15:36:14 +0000 Subject: Add FDT-based attachment for qciic(4). ok kettenis@ --- sys/dev/acpi/files.acpi | 5 +- sys/dev/acpi/qciic.c | 14 +- sys/dev/fdt/files.fdt | 6 +- sys/dev/fdt/qciic_fdt.c | 345 ++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 359 insertions(+), 11 deletions(-) create mode 100644 sys/dev/fdt/qciic_fdt.c (limited to 'sys/dev') diff --git a/sys/dev/acpi/files.acpi b/sys/dev/acpi/files.acpi index 8f001185abf..cf0a4e83eda 100644 --- a/sys/dev/acpi/files.acpi +++ b/sys/dev/acpi/files.acpi @@ -1,4 +1,4 @@ -# $OpenBSD: files.acpi,v 1.66 2022/11/06 15:33:58 patrick Exp $ +# $OpenBSD: files.acpi,v 1.67 2022/11/06 15:36:13 patrick Exp $ # # Config file and device description for machine-independent ACPI code. # Included by ports that need it. @@ -269,6 +269,5 @@ attach qcgpio at acpi with qcgpio_acpi file dev/acpi/qcgpio.c qcgpio # Qualcomm I2C controller -device qciic: i2cbus -attach qciic at acpi +attach qciic at acpi with qciic_acpi file dev/acpi/qciic.c qciic diff --git a/sys/dev/acpi/qciic.c b/sys/dev/acpi/qciic.c index ad10f410825..8f1eaaccc71 100644 --- a/sys/dev/acpi/qciic.c +++ b/sys/dev/acpi/qciic.c @@ -1,4 +1,4 @@ -/* $OpenBSD: qciic.c,v 1.4 2022/09/11 18:07:26 kettenis Exp $ */ +/* $OpenBSD: qciic.c,v 1.5 2022/11/06 15:36:13 patrick Exp $ */ /* * Copyright (c) 2022 Mark Kettenis * @@ -76,11 +76,11 @@ struct qciic_crs { struct aml_node *node; }; -int qciic_match(struct device *, void *, void *); -void qciic_attach(struct device *, struct device *, void *); +int qciic_acpi_match(struct device *, void *, void *); +void qciic_acpi_attach(struct device *, struct device *, void *); -const struct cfattach qciic_ca = { - sizeof (struct qciic_softc), qciic_match, qciic_attach +const struct cfattach qciic_acpi_ca = { + sizeof (struct qciic_softc), qciic_acpi_match, qciic_acpi_attach }; struct cfdriver qciic_cd = { @@ -111,7 +111,7 @@ const char *qciic_hids[] = { }; int -qciic_match(struct device *parent, void *match, void *aux) +qciic_acpi_match(struct device *parent, void *match, void *aux) { struct acpi_attach_args *aaa = aux; struct cfdata *cf = match; @@ -122,7 +122,7 @@ qciic_match(struct device *parent, void *match, void *aux) } void -qciic_attach(struct device *parent, struct device *self, void *aux) +qciic_acpi_attach(struct device *parent, struct device *self, void *aux) { struct qciic_softc *sc = (struct qciic_softc *)self; struct acpi_attach_args *aaa = aux; diff --git a/sys/dev/fdt/files.fdt b/sys/dev/fdt/files.fdt index a19835ea4e1..2855c761ece 100644 --- a/sys/dev/fdt/files.fdt +++ b/sys/dev/fdt/files.fdt @@ -1,4 +1,4 @@ -# $OpenBSD: files.fdt,v 1.166 2022/11/06 15:33:58 patrick Exp $ +# $OpenBSD: files.fdt,v 1.167 2022/11/06 15:36:13 patrick Exp $ # # Config file and device description for machine-independent FDT code. # Included by ports that need it. @@ -628,3 +628,7 @@ file dev/fdt/qcdwusb.c qcdwusb # Qualcomm GPIO controller attach qcgpio at fdt with qcgpio_fdt file dev/fdt/qcgpio_fdt.c qcgpio + +# Qualcomm I2C controller +attach qciic at fdt with qciic_fdt +file dev/fdt/qciic_fdt.c qciic diff --git a/sys/dev/fdt/qciic_fdt.c b/sys/dev/fdt/qciic_fdt.c new file mode 100644 index 00000000000..acafcc67753 --- /dev/null +++ b/sys/dev/fdt/qciic_fdt.c @@ -0,0 +1,345 @@ +/* $OpenBSD: qciic_fdt.c,v 1.1 2022/11/06 15:36:13 patrick Exp $ */ +/* + * Copyright (c) 2022 Mark Kettenis + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include +#include +#include + +#include +#include +#include + +#include +#include +#include + +#define _I2C_PRIVATE +#include + +/* Registers */ +#define GENI_I2C_TX_TRANS_LEN 0x26c +#define GENI_I2C_RX_TRANS_LEN 0x270 +#define GENI_M_CMD0 0x600 +#define GENI_M_CMD0_OPCODE_I2C_WRITE (0x1 << 27) +#define GENI_M_CMD0_OPCODE_I2C_READ (0x2 << 27) +#define GENI_M_CMD0_SLV_ADDR_SHIFT 9 +#define GENI_M_CMD0_STOP_STRETCH (1 << 2) +#define GENI_M_IRQ_STATUS 0x610 +#define GENI_M_IRQ_CLEAR 0x618 +#define GENI_M_IRQ_CMD_DONE (1 << 0) +#define GENI_TX_FIFO 0x700 +#define GENI_RX_FIFO 0x780 +#define GENI_TX_FIFO_STATUS 0x800 +#define GENI_RX_FIFO_STATUS 0x804 +#define GENI_RX_FIFO_STATUS_WC(val) ((val) & 0xffffff) + +#define HREAD4(sc, reg) \ + (bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg))) +#define HWRITE4(sc, reg, val) \ + bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val)) + +struct qciic_fdt_softc { + struct device sc_dev; + bus_space_tag_t sc_iot; + bus_space_handle_t sc_ioh; + + int sc_node; + struct device *sc_iic; + + struct i2c_controller sc_ic; +}; + +int qciic_fdt_match(struct device *, void *, void *); +void qciic_fdt_attach(struct device *, struct device *, void *); + +const struct cfattach qciic_fdt_ca = { + sizeof (struct qciic_fdt_softc), qciic_fdt_match, qciic_fdt_attach +}; + +int qciic_fdt_acquire_bus(void *, int); +void qciic_fdt_release_bus(void *, int); +int qciic_fdt_exec(void *, i2c_op_t, i2c_addr_t, const void *, size_t, + void *, size_t, int); + +void *qciic_fdt_i2c_intr_establish(void *, void *, int, int (*)(void *), + void *, const char *); +void qciic_fdt_i2c_intr_disestablish(void *, void *); +const char *qciic_fdt_i2c_intr_string(void *, void *); + +void qciic_fdt_bus_scan(struct device *, struct i2cbus_attach_args *, + void *); + +int +qciic_fdt_match(struct device *parent, void *match, void *aux) +{ + struct fdt_attach_args *faa = aux; + + return OF_is_compatible(faa->fa_node, "qcom,geni-i2c"); +} + +void +qciic_fdt_attach(struct device *parent, struct device *self, void *aux) +{ + struct qciic_fdt_softc *sc = (struct qciic_fdt_softc *)self; + struct fdt_attach_args *faa = aux; + struct i2cbus_attach_args iba; + + sc->sc_node = faa->fa_node; + + sc->sc_iot = faa->fa_iot; + if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, faa->fa_reg[0].size, + 0, &sc->sc_ioh)) { + printf(": can't map registers\n"); + return; + } + + printf("\n"); + + sc->sc_ic.ic_cookie = sc; + sc->sc_ic.ic_acquire_bus = qciic_fdt_acquire_bus; + sc->sc_ic.ic_release_bus = qciic_fdt_release_bus; + sc->sc_ic.ic_exec = qciic_fdt_exec; + sc->sc_ic.ic_intr_establish = qciic_fdt_i2c_intr_establish; + sc->sc_ic.ic_intr_disestablish = qciic_fdt_i2c_intr_disestablish; + sc->sc_ic.ic_intr_string = qciic_fdt_i2c_intr_string; + + memset(&iba, 0, sizeof(iba)); + iba.iba_name = "iic"; + iba.iba_tag = &sc->sc_ic; + iba.iba_bus_scan = qciic_fdt_bus_scan; + iba.iba_bus_scan_arg = &sc->sc_node; + config_found(&sc->sc_dev, &iba, iicbus_print); +} + +int +qciic_fdt_acquire_bus(void *cookie, int flags) +{ + return 0; +} + +void +qciic_fdt_release_bus(void *cookie, int flags) +{ +} + +int +qciic_fdt_wait(struct qciic_fdt_softc *sc, uint32_t bits) +{ + uint32_t stat; + int timo; + + for (timo = 50000; timo > 0; timo--) { + stat = HREAD4(sc, GENI_M_IRQ_STATUS); + if (stat & bits) + break; + delay(10); + } + if (timo == 0) + return ETIMEDOUT; + + return 0; +} + +int +qciic_fdt_read(struct qciic_fdt_softc *sc, uint8_t *buf, size_t len) +{ + uint32_t stat, word; + int timo, i; + + word = 0; + for (i = 0; i < len; i++) { + if ((i % 4) == 0) { + for (timo = 50000; timo > 0; timo--) { + stat = HREAD4(sc, GENI_RX_FIFO_STATUS); + if (GENI_RX_FIFO_STATUS_WC(stat) > 0) + break; + delay(10); + } + if (timo == 0) + return ETIMEDOUT; + word = HREAD4(sc, GENI_RX_FIFO); + } + buf[i] = word >> ((i % 4) * 8); + } + + return 0; +} + +int +qciic_fdt_write(struct qciic_fdt_softc *sc, const uint8_t *buf, size_t len) +{ + uint32_t stat, word; + int timo, i; + + word = 0; + for (i = 0; i < len; i++) { + word |= buf[i] << ((i % 4) * 8); + if ((i % 4) == 3 || i == (len - 1)) { + for (timo = 50000; timo > 0; timo--) { + stat = HREAD4(sc, GENI_TX_FIFO_STATUS); + if (stat < 16) + break; + delay(10); + } + if (timo == 0) + return ETIMEDOUT; + HWRITE4(sc, GENI_TX_FIFO, word); + word = 0; + } + } + + return 0; +} + +int +qciic_fdt_exec(void *cookie, i2c_op_t op, i2c_addr_t addr, const void *cmd, + size_t cmdlen, void *buf, size_t buflen, int flags) +{ + struct qciic_fdt_softc *sc = cookie; + uint32_t m_cmd, m_param, stat; + int error; + + m_param = addr << GENI_M_CMD0_SLV_ADDR_SHIFT; + m_param |= GENI_M_CMD0_STOP_STRETCH; + + if (buflen == 0 && I2C_OP_STOP_P(op)) + m_param &= ~GENI_M_CMD0_STOP_STRETCH; + + if (cmdlen > 0) { + stat = HREAD4(sc, GENI_M_IRQ_STATUS); + HWRITE4(sc, GENI_M_IRQ_CLEAR, stat); + HWRITE4(sc, GENI_I2C_TX_TRANS_LEN, cmdlen); + m_cmd = GENI_M_CMD0_OPCODE_I2C_WRITE | m_param; + HWRITE4(sc, GENI_M_CMD0, m_cmd); + + error = qciic_fdt_write(sc, cmd, cmdlen); + if (error) + return error; + + error = qciic_fdt_wait(sc, GENI_M_IRQ_CMD_DONE); + if (error) + return error; + } + + if (buflen == 0) + return 0; + + if (I2C_OP_STOP_P(op)) + m_param &= ~GENI_M_CMD0_STOP_STRETCH; + + if (I2C_OP_READ_P(op)) { + stat = HREAD4(sc, GENI_M_IRQ_STATUS); + HWRITE4(sc, GENI_M_IRQ_CLEAR, stat); + HWRITE4(sc, GENI_I2C_RX_TRANS_LEN, buflen); + m_cmd = GENI_M_CMD0_OPCODE_I2C_READ | m_param; + HWRITE4(sc, GENI_M_CMD0, m_cmd); + + error = qciic_fdt_read(sc, buf, buflen); + if (error) + return error; + + error = qciic_fdt_wait(sc, GENI_M_IRQ_CMD_DONE); + if (error) + return error; + } else { + stat = HREAD4(sc, GENI_M_IRQ_STATUS); + HWRITE4(sc, GENI_M_IRQ_CLEAR, stat); + HWRITE4(sc, GENI_I2C_TX_TRANS_LEN, buflen); + m_cmd = GENI_M_CMD0_OPCODE_I2C_WRITE | m_param; + HWRITE4(sc, GENI_M_CMD0, m_cmd); + + error = qciic_fdt_write(sc, buf, buflen); + if (error) + return error; + + error = qciic_fdt_wait(sc, GENI_M_IRQ_CMD_DONE); + if (error) + return error; + } + + return 0; +} + +void * +qciic_fdt_i2c_intr_establish(void *cookie, void *ih, int level, + int (*func)(void *), void *arg, const char *name) +{ + int node = *(int *)ih; + + return fdt_intr_establish(node, level, func, arg, (char *)name); +} + +void +qciic_fdt_i2c_intr_disestablish(void *cookie, void *ih) +{ + fdt_intr_disestablish(ih); +} + +const char * +qciic_fdt_i2c_intr_string(void *cookie, void *ih) +{ + static char irqstr[64]; + + snprintf(irqstr, sizeof(irqstr), "irq"); + + return irqstr; +} + +void +qciic_fdt_bus_scan(struct device *self, struct i2cbus_attach_args *iba, void *aux) +{ + int iba_node = *(int *)aux; + extern int iic_print(void *, const char *); + struct i2c_attach_args ia; + char name[32], status[32]; + uint32_t reg[1]; + int node; + + for (node = OF_child(iba_node); node; node = OF_peer(node)) { + memset(name, 0, sizeof(name)); + memset(status, 0, sizeof(status)); + memset(reg, 0, sizeof(reg)); + + if (OF_getprop(node, "compatible", name, sizeof(name)) == -1) + continue; + if (name[0] == '\0') + continue; + + if (OF_getprop(node, "status", status, sizeof(status)) > 0 && + strcmp(status, "disabled") == 0) + continue; + + if (OF_getprop(node, "reg", ®, sizeof(reg)) != sizeof(reg)) + continue; + + memset(&ia, 0, sizeof(ia)); + ia.ia_tag = iba->iba_tag; + ia.ia_addr = bemtoh32(®[0]); + ia.ia_name = name; + ia.ia_cookie = &node; + ia.ia_intr = &node; + + /* Quirk for ihidev(4) */ + if (strcmp(name, "hid-over-i2c") == 0) { + ia.ia_name = "ihidev"; + ia.ia_size = OF_getpropint(node, "hid-descr-addr", 0); + ia.ia_cookie = name; + } + + config_found(self, &ia, iic_print); + } +} -- cgit v1.2.3