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Tue, 17 Jan 2023 21:42:22 -0500 (EST) From: Peter Delevoryas To: Cc: peter@pjd.dev, clg@kaod.org, peter.maydell@linaro.org, andrew@aj.id.au, joel@jms.id.au, hskinnemoen@google.com, kfting@nuvoton.com, qemu-arm@nongnu.org, qemu-devel@nongnu.org, philmd@linaro.org Subject: [PATCH v4 3/5] hw/nvram/eeprom_at24c: Add init_rom field and at24c_eeprom_init_rom helper Date: Tue, 17 Jan 2023 18:42:12 -0800 Message-Id: <20230118024214.14413-4-peter@pjd.dev> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230118024214.14413-1-peter@pjd.dev> References: <20230118024214.14413-1-peter@pjd.dev> MIME-Version: 1.0 Received-SPF: pass client-ip=66.111.4.26; envelope-from=peter@pjd.dev; helo=out2-smtp.messagingengine.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 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 Allows users to specify binary data to initialize an EEPROM, allowing users to emulate data programmed at manufacturing time. - Added init_rom and init_rom_size attributes to TYPE_AT24C_EE - Added at24c_eeprom_init_rom helper function to initialize attributes - If -drive property is provided, it overrides init_rom data Signed-off-by: Peter Delevoryas Reviewed-by: Joel Stanley Reviewed-by: Cédric Le Goater Reviewed-by: Corey Minyard --- hw/nvram/eeprom_at24c.c | 37 ++++++++++++++++++++++++++++----- include/hw/nvram/eeprom_at24c.h | 16 ++++++++++++++ 2 files changed, 48 insertions(+), 5 deletions(-) diff --git a/hw/nvram/eeprom_at24c.c b/hw/nvram/eeprom_at24c.c index 98857e3626b9..f8d751fa278d 100644 --- a/hw/nvram/eeprom_at24c.c +++ b/hw/nvram/eeprom_at24c.c @@ -50,6 +50,9 @@ struct EEPROMState { uint8_t *mem; BlockBackend *blk; + + const uint8_t *init_rom; + uint32_t init_rom_size; }; static @@ -131,19 +134,38 @@ int at24c_eeprom_send(I2CSlave *s, uint8_t data) I2CSlave *at24c_eeprom_init(I2CBus *bus, uint8_t address, uint32_t rom_size) { - I2CSlave *i2c_dev = i2c_slave_new(TYPE_AT24C_EE, address); - DeviceState *dev = DEVICE(i2c_dev); + return at24c_eeprom_init_rom(bus, address, rom_size, NULL, 0); +} + +I2CSlave *at24c_eeprom_init_rom(I2CBus *bus, uint8_t address, uint32_t rom_size, + const uint8_t *init_rom, uint32_t init_rom_size) +{ + EEPROMState *s; + + s = AT24C_EE(qdev_new(TYPE_AT24C_EE)); + + qdev_prop_set_uint8(DEVICE(s), "address", address); + qdev_prop_set_uint32(DEVICE(s), "rom-size", rom_size); - qdev_prop_set_uint32(dev, "rom-size", rom_size); - i2c_slave_realize_and_unref(i2c_dev, bus, &error_abort); + /* TODO: Model init_rom with QOM properties. */ + s->init_rom = init_rom; + s->init_rom_size = init_rom_size; - return i2c_dev; + i2c_slave_realize_and_unref(I2C_SLAVE(s), bus, &error_abort); + + return I2C_SLAVE(s); } static void at24c_eeprom_realize(DeviceState *dev, Error **errp) { EEPROMState *ee = AT24C_EE(dev); + if (ee->init_rom_size > ee->rsize) { + error_setg(errp, "%s: init rom is larger than rom: %u > %u", + TYPE_AT24C_EE, ee->init_rom_size, ee->rsize); + return; + } + if (ee->blk) { int64_t len = blk_getlength(ee->blk); @@ -163,6 +185,7 @@ static void at24c_eeprom_realize(DeviceState *dev, Error **errp) } ee->mem = g_malloc0(ee->rsize); + } static @@ -176,6 +199,10 @@ void at24c_eeprom_reset(DeviceState *state) memset(ee->mem, 0, ee->rsize); + if (ee->init_rom) { + memcpy(ee->mem, ee->init_rom, MIN(ee->init_rom_size, ee->rsize)); + } + if (ee->blk) { int ret = blk_pread(ee->blk, 0, ee->rsize, ee->mem, 0); diff --git a/include/hw/nvram/eeprom_at24c.h b/include/hw/nvram/eeprom_at24c.h index 196db309d451..acb9857b2add 100644 --- a/include/hw/nvram/eeprom_at24c.h +++ b/include/hw/nvram/eeprom_at24c.h @@ -20,4 +20,20 @@ */ I2CSlave *at24c_eeprom_init(I2CBus *bus, uint8_t address, uint32_t rom_size); + +/* + * Create and realize an AT24C EEPROM device on the heap with initial data. + * @bus: I2C bus to put it on + * @address: I2C address of the EEPROM slave when put on a bus + * @rom_size: size of the EEPROM + * @init_rom: Array of bytes to initialize EEPROM memory with + * @init_rom_size: Size of @init_rom, must be less than or equal to @rom_size + * + * Create the device state structure, initialize it, put it on the specified + * @bus, and drop the reference to it (the device is realized). Copies the data + * from @init_rom to the beginning of the EEPROM memory buffer. + */ +I2CSlave *at24c_eeprom_init_rom(I2CBus *bus, uint8_t address, uint32_t rom_size, + const uint8_t *init_rom, uint32_t init_rom_size); + #endif