/* $NetBSD: voyager.c,v 1.20 2025/09/15 13:23:03 thorpej Exp $ */ /* * Copyright (c) 2009, 2011 Michael Lorenz * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: voyager.c,v 1.20 2025/09/15 13:23:03 thorpej Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "opt_voyager.h" #include "voyagerfb.h" #include "pwmclock.h" #ifdef VOYAGER_DEBUG #define DPRINTF aprint_normal #else #define DPRINTF while (0) printf #endif /* interrupt stuff */ struct voyager_intr { int (*vih_func)(void *); void *vih_arg; struct evcnt vih_count; char vih_name[32]; }; struct voyager_softc { device_t sc_dev; pci_chipset_tag_t sc_pc; pcitag_t sc_pcitag; bus_space_tag_t sc_memt; bus_space_tag_t sc_iot; bus_space_handle_t sc_fbh, sc_regh; bus_addr_t sc_fb, sc_reg; bus_size_t sc_fbsize, sc_regsize; struct i2c_controller sc_i2c; /* interrupt dispatcher */ void *sc_ih; struct voyager_intr sc_intrs[32]; }; void *voyager_cookie = NULL; static int voyager_match(device_t, cfdata_t, void *); static void voyager_attach(device_t, device_t, void *); static int voyager_print(void *, const char *); static int voyager_intr(void *); CFATTACH_DECL_NEW(voyager, sizeof(struct voyager_softc), voyager_match, voyager_attach, NULL, NULL); /* I2C glue */ static int voyager_i2c_send_start(void *, int); static int voyager_i2c_send_stop(void *, int); static int voyager_i2c_initiate_xfer(void *, i2c_addr_t, int); static int voyager_i2c_read_byte(void *, uint8_t *, int); static int voyager_i2c_write_byte(void *, uint8_t, int); /* I2C bitbang glue */ static void voyager_i2cbb_set_bits(void *, uint32_t); static void voyager_i2cbb_set_dir(void *, uint32_t); static uint32_t voyager_i2cbb_read(void *); static const struct i2c_bitbang_ops voyager_i2cbb_ops = { voyager_i2cbb_set_bits, voyager_i2cbb_set_dir, voyager_i2cbb_read, { 1 << 13, 1 << 6, 1 << 13, 0 } }; #define GPIO_I2C_BITS ((1 << 6) | (1 << 13)) #ifdef VOYAGER_DEBUG static void voyager_print_pwm(struct voyager_softc *, int); #endif static int voyager_match(device_t parent, cfdata_t match, void *aux) { struct pci_attach_args *pa = (struct pci_attach_args *)aux; if (PCI_CLASS(pa->pa_class) != PCI_CLASS_DISPLAY) return 0; if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_SILMOTION) return 0; /* only chip tested on so far - may need a list */ if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SILMOTION_SM502) return 100; return (0); } static void voyager_attach(device_t parent, device_t self, void *aux) { struct voyager_softc *sc = device_private(self); struct pci_attach_args *pa = aux; pci_intr_handle_t ih; struct voyager_attach_args vaa; uint32_t reg; const char *intrstr; int i; char intrbuf[PCI_INTRSTR_LEN]; sc->sc_pc = pa->pa_pc; sc->sc_pcitag = pa->pa_tag; sc->sc_memt = pa->pa_memt; sc->sc_iot = pa->pa_iot; sc->sc_dev = self; voyager_cookie = sc; pci_aprint_devinfo(pa, NULL); if (pci_mapreg_map(pa, 0x14, PCI_MAPREG_TYPE_MEM, 0, &sc->sc_memt, &sc->sc_regh, &sc->sc_reg, &sc->sc_regsize)) { aprint_error("%s: failed to map registers.\n", device_xname(sc->sc_dev)); } if (pci_mapreg_map(pa, 0x10, PCI_MAPREG_TYPE_MEM, BUS_SPACE_MAP_LINEAR, &sc->sc_memt, &sc->sc_fbh, &sc->sc_fb, &sc->sc_fbsize)) { aprint_error("%s: failed to map the frame buffer.\n", device_xname(sc->sc_dev)); } /* disable all interrupts */ bus_space_write_4(sc->sc_memt, sc->sc_regh, SM502_INTR_MASK, 0); /* initialize handler list */ for (i = 0; i < 32; i++) { sc->sc_intrs[i].vih_func = NULL; snprintf(sc->sc_intrs[i].vih_name, 32, "int %d", i); evcnt_attach_dynamic(&sc->sc_intrs[i].vih_count, EVCNT_TYPE_INTR, NULL, "voyager", sc->sc_intrs[i].vih_name); } /* Map and establish the interrupt. */ if (pci_intr_map(pa, &ih)) { aprint_error_dev(self, "couldn't map interrupt\n"); return; } intrstr = pci_intr_string(sc->sc_pc, ih, intrbuf, sizeof(intrbuf)); sc->sc_ih = pci_intr_establish_xname(sc->sc_pc, ih, IPL_VM, voyager_intr, NULL, /* so we get the clock frame instead */ device_xname(self)); if (sc->sc_ih == NULL) { aprint_error_dev(self, "couldn't establish interrupt"); if (intrstr != NULL) aprint_error(" at %s", intrstr); aprint_error("\n"); return; } aprint_normal_dev(self, "interrupting at %s\n", intrstr); #ifdef VOYAGER_DEBUG voyager_print_pwm(sc, SM502_PWM0); voyager_print_pwm(sc, SM502_PWM1); voyager_print_pwm(sc, SM502_PWM2); #endif /* attach the framebuffer driver */ vaa.vaa_memh = sc->sc_fbh; vaa.vaa_mem_pa = sc->sc_fb; vaa.vaa_regh = sc->sc_regh; vaa.vaa_reg_pa = sc->sc_reg; vaa.vaa_tag = sc->sc_memt; vaa.vaa_pc = sc->sc_pc; vaa.vaa_pcitag = sc->sc_pcitag; #if NVOYAGERFB > 0 strcpy(vaa.vaa_name, "voyagerfb"); config_found(sc->sc_dev, &vaa, voyager_print, CFARGS(.iattr = "voyagerbus")); #endif #if NPWMCLOCK > 0 strcpy(vaa.vaa_name, "pwmclock"); config_found(sc->sc_dev, &vaa, voyager_print, CFARGS(.iattr = "voyagerbus")); #endif #ifdef notyet strcpy(vaa.vaa_name, "vac"); config_found(sc->sc_dev, &vaa, voyager_print, CFARGS(.iattr = "voyagerbus")); #endif /* * see if the i2c pins are configured as gpio and if so, use them * should probably be a compile time option */ reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, SM502_GPIO0_CONTROL); if ((reg & GPIO_I2C_BITS) == 0) { /* both bits as outputs */ voyager_gpio_dir(sc, 0xffffffff, GPIO_I2C_BITS); /* Fill in the i2c tag */ iic_tag_init(&sc->sc_i2c); sc->sc_i2c.ic_cookie = sc; sc->sc_i2c.ic_send_start = voyager_i2c_send_start; sc->sc_i2c.ic_send_stop = voyager_i2c_send_stop; sc->sc_i2c.ic_initiate_xfer = voyager_i2c_initiate_xfer; sc->sc_i2c.ic_read_byte = voyager_i2c_read_byte; sc->sc_i2c.ic_write_byte = voyager_i2c_write_byte; iicbus_attach(self, &sc->sc_i2c); } voyager_control_gpio(sc, ~(1 << 16), 0); voyager_gpio_dir(sc, 0xffffffff, 1 << 16); voyager_write_gpio(sc, 0xffffffff, 1 << 16); } static int voyager_print(void *aux, const char *what) { /*struct voyager_attach_args *vaa = aux;*/ if (what == NULL) return 0; printf("%s:", what); return 0; } static void voyager_i2cbb_set_bits(void *cookie, uint32_t bits) { struct voyager_softc *sc = cookie; uint32_t reg; reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, SM502_GPIO_DATA0); reg &= ~GPIO_I2C_BITS; reg |= bits; bus_space_write_4(sc->sc_memt, sc->sc_regh, SM502_GPIO_DATA0, reg); } static void voyager_i2cbb_set_dir(void *cookie, uint32_t bits) { struct voyager_softc *sc = cookie; uint32_t reg; reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, SM502_GPIO_DIR0); reg &= ~(1 << 13); reg |= bits; bus_space_write_4(sc->sc_memt, sc->sc_regh, SM502_GPIO_DIR0, reg); } static uint32_t voyager_i2cbb_read(void *cookie) { struct voyager_softc *sc = cookie; uint32_t reg; reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, SM502_GPIO_DATA0); return reg; } static int voyager_i2c_send_start(void *cookie, int flags) { return (i2c_bitbang_send_start(cookie, flags, &voyager_i2cbb_ops)); } static int voyager_i2c_send_stop(void *cookie, int flags) { return (i2c_bitbang_send_stop(cookie, flags, &voyager_i2cbb_ops)); } static int voyager_i2c_initiate_xfer(void *cookie, i2c_addr_t addr, int flags) { /* * for some reason i2c_bitbang_initiate_xfer left-shifts * the I2C-address and then sets the direction bit */ return (i2c_bitbang_initiate_xfer(cookie, addr, flags, &voyager_i2cbb_ops)); } static int voyager_i2c_read_byte(void *cookie, uint8_t *valp, int flags) { int ret; ret = i2c_bitbang_read_byte(cookie, valp, flags, &voyager_i2cbb_ops); return ret; } static int voyager_i2c_write_byte(void *cookie, uint8_t val, int flags) { int ret; ret = i2c_bitbang_write_byte(cookie, val, flags, &voyager_i2cbb_ops); delay(500); return ret; } void voyager_twiddle_bits(void *cookie, int regnum, uint32_t mask, uint32_t bits) { struct voyager_softc *sc = cookie; uint32_t reg; /* don't interfere with i2c ops */ mutex_enter(&sc->sc_i2c.ic_bus_lock); reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, regnum); reg &= mask; reg |= bits; bus_space_write_4(sc->sc_memt, sc->sc_regh, regnum, reg); mutex_exit(&sc->sc_i2c.ic_bus_lock); } static int voyager_intr(void *cookie) { struct voyager_softc *sc = voyager_cookie; struct voyager_intr *ih; uint32_t intrs; uint32_t mask, bit; int num; intrs = bus_space_read_4(sc->sc_memt, sc->sc_regh, SM502_INTR_STATUS); mask = bus_space_read_4(sc->sc_memt, sc->sc_regh, SM502_INTR_MASK); intrs &= mask; while (intrs != 0) { num = ffs32(intrs) - 1; bit = 1 << num; intrs &= ~bit; ih = &sc->sc_intrs[num]; if (ih->vih_func != NULL) { if (ih->vih_arg == NULL) { ih->vih_func(cookie); } else { ih->vih_func(ih->vih_arg); } } ih->vih_count.ev_count++; } return 0; } void * voyager_establish_intr(device_t dev, int bit, int (*handler)(void *), void *arg) { struct voyager_softc *sc = device_private(dev); struct voyager_intr *ih; uint32_t reg; if ((bit < 0) || (bit > 31)) { aprint_error_dev(dev, "bogus interrupt %d\n", bit); return NULL; } ih = &sc->sc_intrs[bit]; if (ih->vih_func != NULL) { aprint_error_dev(dev, "interrupt %d is already in use\n", bit); return NULL; } ih->vih_func = handler; ih->vih_arg = arg; reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, SM502_INTR_MASK); reg |= 1 << bit; bus_space_write_4(sc->sc_memt, sc->sc_regh, SM502_INTR_MASK, reg); return (void *)(uintptr_t)(0x80000000 | bit); } void voyager_disestablish_intr(device_t dev, void *ih) { } /* timer */ #ifdef VOYAGER_DEBUG static void voyager_print_pwm(struct voyager_softc *sc, int pwmreg) { uint32_t reg; reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, pwmreg); aprint_debug_dev(sc->sc_dev, "%08x: %08x = %d Hz, %d high, %d low\n", pwmreg, reg, 96000000 / (1 << ((reg & SM502_PWM_CLOCK_DIV_MASK) >> SM502_PWM_CLOCK_DIV_SHIFT)), (reg & SM502_PWM_CLOCK_HIGH_MASK) >> SM502_PWM_CLOCK_HIGH_SHIFT, (reg & SM502_PWM_CLOCK_LOW_MASK) >> SM502_PWM_CLOCK_LOW_SHIFT); } #endif uint32_t voyager_set_pwm(int freq, int duty_cycle) { int ifreq, factor, bit, steps; uint32_t reg = 0, hi, lo; /* * find the smallest divider that gets us within 4096 steps of the * target frequency */ ifreq = freq * 4096; factor = 96000000 / ifreq; bit = fls32(factor); factor = 1 << bit; steps = 96000000 / (factor * freq); /* can't have it all off */ if (duty_cycle < 1) duty_cycle = 1; /* can't be always on either */ if (duty_cycle > 999) duty_cycle = 999; hi = steps * duty_cycle / 1000; if (hi < 1) hi = 1; lo = steps - hi; if (lo < 1) { hi = steps - 1; lo = 1; } DPRINTF("%d hz -> %d, %d, %d / %d\n", freq, factor, steps, lo, hi); reg = ((hi - 1) & 0xfff) << SM502_PWM_CLOCK_HIGH_SHIFT; reg |= ((lo - 1) & 0xfff) << SM502_PWM_CLOCK_LOW_SHIFT; reg |= (bit & 0xf) << SM502_PWM_CLOCK_DIV_SHIFT; DPRINTF("reg: %08x\n", reg); return reg; }