From patchwork Wed Jul 26 13:24:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergey Kambalin X-Patchwork-Id: 1813189 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20221208 header.b=khXncxjy; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4R9xFL36s0z1yYc for ; Thu, 27 Jul 2023 00:32:38 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qOeWJ-0002js-AH; Wed, 26 Jul 2023 09:25:40 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qOeWB-0002cG-9n; Wed, 26 Jul 2023 09:25:31 -0400 Received: from mail-lf1-x131.google.com ([2a00:1450:4864:20::131]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qOeW9-00039l-5e; Wed, 26 Jul 2023 09:25:30 -0400 Received: by mail-lf1-x131.google.com with SMTP id 2adb3069b0e04-4fe05fbe250so2996843e87.0; Wed, 26 Jul 2023 06:25:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1690377927; x=1690982727; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=+wVe0eUBLqPm0eczAYS/bVDkPjCsXHCk5Md+hKvYTUU=; b=khXncxjyS9wYos3u37mTyFOtwhj2HKTTr7HspuoikiTqchExSmNUswDcLLJKDDjBPt iKeF5WC4Uup9VH5ZeJweg3a1hN5S4l6VP9jSUJue3WrK9qVWxnEcosjfLMkzdVPXkrid TbDrkwKGPAl6nDcGAUNU3zgZg1MOHTYAWI5uoTT0xufeGakeki9FyaP6ah1wCtcSgLp9 SxqEzVawDO/2HgSGccnKVfVdRhHcPygjGtS1svw0vevUsMytufvnzv00HJiPysf4IES8 iKUZNR38jyRsXyTYJJoadS93d2vVaPACcBBQWag2RAX1Qrq10YRFs50VrAMRQF1GIidW EWwg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690377927; x=1690982727; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=+wVe0eUBLqPm0eczAYS/bVDkPjCsXHCk5Md+hKvYTUU=; b=fxwRLa2OHHeVGaRGf6rLxPc8xWKxsjqnKUcpl69n7YSddcdRAmm0cQVNDMXr8HiIBL BJoBN9qWwDL3F45qgmaFojhoyOmG5wybBZmzWeyW5UJ36qnSDVFAlxbK1DGUMuc6E+XD Wcos7pkORtU9X55GX/yS7grfQGMq5FwTdWXci6uIpV+Q+1lmYlJXD3TRRt5ZltIyH7z5 6DYfwSqT4c1hR6wmh/n5H/ARuW8gAswb1wwhUa4LMAl4UBraViyvQV3iLjlyyHnzLVQh ixyxsO6YPOAE2FU1DM0HpyzqIkDLkvA8ePzUAKgS2egVaQAelBnnEl0oqG/fGGEEfTA6 mxcw== X-Gm-Message-State: ABy/qLZ9KsGllbfhIkLVAoJ25cysg4cZELeIlaZe9fKGd9uDx95ep9n9 JkKvSOLmS6fxD96zkE0prTRutJ20Qb0= X-Google-Smtp-Source: APBJJlFkMy204fsqljUYe5ZzIcWziXvEmV5QXKR8hTnlhXsQtOP2Rb1TV08tLKCIMoep+55j8stpjA== X-Received: by 2002:a19:9119:0:b0:4f9:5781:8628 with SMTP id t25-20020a199119000000b004f957818628mr1515806lfd.24.1690377926773; Wed, 26 Jul 2023 06:25:26 -0700 (PDT) Received: from sergevik-thinkpad.localdomain ([213.197.136.186]) by smtp.gmail.com with ESMTPSA id j22-20020a19f516000000b004fe0c3d8bb4sm565079lfb.84.2023.07.26.06.25.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Jul 2023 06:25:26 -0700 (PDT) From: Sergey Kambalin X-Google-Original-From: Sergey Kambalin To: qemu-arm@nongnu.org Cc: qemu-devel@nongnu.org, Sergey Kambalin Subject: [PATCH 07/44] Implement BCM2838 GPIO functionality Date: Wed, 26 Jul 2023 16:24:35 +0300 Message-Id: <20230726132512.149618-8-sergey.kambalin@auriga.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230726132512.149618-1-sergey.kambalin@auriga.com> References: <20230726132512.149618-1-sergey.kambalin@auriga.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::131; envelope-from=serg.oker@gmail.com; helo=mail-lf1-x131.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Signed-off-by: Sergey Kambalin Reviewed-by: Peter Maydell --- hw/gpio/bcm2838_gpio.c | 197 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 193 insertions(+), 4 deletions(-) diff --git a/hw/gpio/bcm2838_gpio.c b/hw/gpio/bcm2838_gpio.c index 59be608250..cc9f4f74a0 100644 --- a/hw/gpio/bcm2838_gpio.c +++ b/hw/gpio/bcm2838_gpio.c @@ -18,6 +18,7 @@ #include "qapi/error.h" #include "hw/sysbus.h" #include "hw/gpio/bcm2838_gpio.h" +#include "hw/irq.h" #define GPFSEL0 0x00 #define GPFSEL1 0x04 @@ -56,14 +57,139 @@ #define RESET_VAL_CNTRL_REG2 0x50AAA95A; #define RESET_VAL_CNTRL_REG3 0x00055555; +#define NUM_FSELN_IN_GPFSELN 10 +#define NUM_BITS_FSELN 3 +#define MASK_FSELN 0x7 + #define BYTES_IN_WORD 4 +static uint32_t gpfsel_get(BCM2838GpioState *s, uint8_t reg) +{ + int i; + uint32_t value = 0; + for (i = 0; i < NUM_FSELN_IN_GPFSELN; i++) { + uint32_t index = NUM_FSELN_IN_GPFSELN * reg + i; + if (index < sizeof(s->fsel)) { + value |= (s->fsel[index] & MASK_FSELN) << (NUM_BITS_FSELN * i); + } + } + return value; +} + +static void gpfsel_set(BCM2838GpioState *s, uint8_t reg, uint32_t value) +{ + int i; + for (i = 0; i < NUM_FSELN_IN_GPFSELN; i++) { + uint32_t index = NUM_FSELN_IN_GPFSELN * reg + i; + if (index < sizeof(s->fsel)) { + int fsel = (value >> (NUM_BITS_FSELN * i)) & MASK_FSELN; + s->fsel[index] = fsel; + } + } +} + +static int gpfsel_is_out(BCM2838GpioState *s, int index) +{ + if (index >= 0 && index < BCM2838_GPIO_NUM) { + return s->fsel[index] == 1; + } + return 0; +} + +static void gpset(BCM2838GpioState *s, uint32_t val, uint8_t start, + uint8_t count, uint32_t *lev) +{ + uint32_t changes = val & ~*lev; + uint32_t cur = 1; + + int i; + for (i = 0; i < count; i++) { + if ((changes & cur) && (gpfsel_is_out(s, start + i))) { + qemu_set_irq(s->out[start + i], 1); + } + cur <<= 1; + } + + *lev |= val; +} + +static void gpclr(BCM2838GpioState *s, uint32_t val, uint8_t start, + uint8_t count, uint32_t *lev) +{ + uint32_t changes = val & *lev; + uint32_t cur = 1; + + int i; + for (i = 0; i < count; i++) { + if ((changes & cur) && (gpfsel_is_out(s, start + i))) { + qemu_set_irq(s->out[start + i], 0); + } + cur <<= 1; + } + + *lev &= ~val; +} + static uint64_t bcm2838_gpio_read(void *opaque, hwaddr offset, unsigned size) { + BCM2838GpioState *s = (BCM2838GpioState *)opaque; uint64_t value = 0; - qemu_log_mask(LOG_UNIMP, "%s: %s: not implemented for %"HWADDR_PRIx"\n", - TYPE_BCM2838_GPIO, __func__, offset); + switch (offset) { + case GPFSEL0: + case GPFSEL1: + case GPFSEL2: + case GPFSEL3: + case GPFSEL4: + case GPFSEL5: + value = gpfsel_get(s, offset / BYTES_IN_WORD); + break; + case GPSET0: + case GPSET1: + case GPCLR0: + case GPCLR1: + /* Write Only */ + qemu_log_mask(LOG_GUEST_ERROR, "%s: %s: Attempt reading from write only" + " register. %lu will be returned. Address 0x%"HWADDR_PRIx + ", size %u\n", TYPE_BCM2838_GPIO, __func__, value, offset, + size); + break; + case GPLEV0: + value = s->lev0; + break; + case GPLEV1: + value = s->lev1; + break; + case GPEDS0: + case GPEDS1: + case GPREN0: + case GPREN1: + case GPFEN0: + case GPFEN1: + case GPHEN0: + case GPHEN1: + case GPLEN0: + case GPLEN1: + case GPAREN0: + case GPAREN1: + case GPAFEN0: + case GPAFEN1: + /* Not implemented */ + qemu_log_mask(LOG_UNIMP, "%s: %s: not implemented for %"HWADDR_PRIx"\n", + TYPE_BCM2838_GPIO, __func__, offset); + break; + case GPIO_PUP_PDN_CNTRL_REG0: + case GPIO_PUP_PDN_CNTRL_REG1: + case GPIO_PUP_PDN_CNTRL_REG2: + case GPIO_PUP_PDN_CNTRL_REG3: + value = s->pup_cntrl_reg[(offset - GPIO_PUP_PDN_CNTRL_REG0) + / sizeof(s->pup_cntrl_reg[0])]; + break; + default: + qemu_log_mask(LOG_GUEST_ERROR, "%s: %s: bad offset %"HWADDR_PRIx"\n", + TYPE_BCM2838_GPIO, __func__, offset); + break; + } return value; } @@ -71,14 +197,77 @@ static uint64_t bcm2838_gpio_read(void *opaque, hwaddr offset, unsigned size) static void bcm2838_gpio_write(void *opaque, hwaddr offset, uint64_t value, unsigned size) { - qemu_log_mask(LOG_UNIMP, "%s: %s: not implemented for %"HWADDR_PRIx"\n", - TYPE_BCM2838_GPIO, __func__, offset); + BCM2838GpioState *s = (BCM2838GpioState *)opaque; + + switch (offset) { + case GPFSEL0: + case GPFSEL1: + case GPFSEL2: + case GPFSEL3: + case GPFSEL4: + case GPFSEL5: + gpfsel_set(s, offset / BYTES_IN_WORD, value); + break; + case GPSET0: + gpset(s, value, 0, 32, &s->lev0); + break; + case GPSET1: + gpset(s, value, 32, 22, &s->lev1); + break; + case GPCLR0: + gpclr(s, value, 0, 32, &s->lev0); + break; + case GPCLR1: + gpclr(s, value, 32, 22, &s->lev1); + break; + case GPLEV0: + case GPLEV1: + /* Read Only */ + qemu_log_mask(LOG_GUEST_ERROR, "%s: %s: Attempt writing %lu to read " + "only register. Ignored. Address 0x%"HWADDR_PRIx", size " + "%u\n", TYPE_BCM2838_GPIO, __func__, value, offset, size); + break; + case GPEDS0: + case GPEDS1: + case GPREN0: + case GPREN1: + case GPFEN0: + case GPFEN1: + case GPHEN0: + case GPHEN1: + case GPLEN0: + case GPLEN1: + case GPAREN0: + case GPAREN1: + case GPAFEN0: + case GPAFEN1: + /* Not implemented */ + qemu_log_mask(LOG_UNIMP, "%s: %s: not implemented for %"HWADDR_PRIx"\n", + TYPE_BCM2838_GPIO, __func__, offset); + break; + case GPIO_PUP_PDN_CNTRL_REG0: + case GPIO_PUP_PDN_CNTRL_REG1: + case GPIO_PUP_PDN_CNTRL_REG2: + case GPIO_PUP_PDN_CNTRL_REG3: + s->pup_cntrl_reg[(offset - GPIO_PUP_PDN_CNTRL_REG0) + / sizeof(s->pup_cntrl_reg[0])] = value; + break; + default: + qemu_log_mask(LOG_GUEST_ERROR, "%s: %s: bad offset %"HWADDR_PRIx"\n", + TYPE_BCM2838_GPIO, __func__, offset); + } + return; } static void bcm2838_gpio_reset(DeviceState *dev) { BCM2838GpioState *s = BCM2838_GPIO(dev); + int i; + for (i = 0; i < 6; i++) { + gpfsel_set(s, i, 0); + } + s->lev0 = 0; s->lev1 = 0;